Workflow: build automation using n8n for Code Filter Create Scheduled
Integrations: code, executeWorkflow, executeWorkflowTrigger, filter, gmail, googleSheets, if, scheduleTrigger, set, stickyNote

{"meta": {"instanceId": "cb484ba7b742928a2048bf8829668bed5b5ad9787579adea888f05980292a4a7"}, "nodes": [{"id": "8565747a-4108-4467-98e4-f57d441f66af", "name": "Update last contacted time", "type": "n8n-nodes-base.googleSheets", "position": [2380, 140], "parameters": {"columns": {"value": {"row_number": "={{ $('To email?').item.json.row_number }}", "first_emailed": "={{ $now.format('yyyy-MM-dd') }}"}, "schema": [{"id": "email", "type": "string", "display": true, "removed": true, "required": false, "displayName": "email", "defaultMatch": false, "canBeUsedToMatch": true}, {"id": "first_emailed", "type": "string", "display": true, "removed": false, "required": false, "displayName": "first_emailed", "defaultMatch": false, "canBeUsedToMatch": true}, {"id": "name", "type": "string", "display": true, "removed": true, "required": false, "displayName": "name", "defaultMatch": false, "canBeUsedToMatch": true}, {"id": "company", "type": "string", "display": true, "removed": true, "required": false, "displayName": "company", "defaultMatch": false, "canBeUsedToMatch": true}, {"id": "row_number", "type": "string", "display": true, "removed": false, "readOnly": true, "required": false, "displayName": "row_number", "defaultMatch": false, "canBeUsedToMatch": true}], "mappingMode": "defineBelow", "matchingColumns": ["row_number"]}, "options": {}, "operation": "update", "sheetName": {"__rl": true, "mode": "url", "value": "={{ $('Settings').item.json.sheet_url }}"}, "documentId": {"__rl": true, "mode": "url", "value": "={{ $('Settings').item.json.sheet_url }}"}}, "credentials": {"googleSheetsOAuth2Api": {"id": "196", "name": "Google Sheets account (David)"}}, "typeVersion": 4.2}, {"id": "5f079ac7-1bef-4bb8-8efe-1f3803357fb1", "name": "Set message template", "type": "n8n-nodes-base.set", "disabled": true, "position": [1500, 1120], "parameters": {"fields": {"values": [{"name": "message_template", "stringValue": "={{ $('Email sequence').first().json.emails[0].message }}"}, {"name": "email", "stringValue": "david@thedavid.co.uk"}, {"name": "name", "stringValue": "Daffyd"}, {"name": "company", "stringValue": "Davey Enterprises"}, {"name": "subject", "stringValue": "={{ $('Settings').item.json.subject }}"}, {"name": "sender_name", "stringValue": "={{ $('Settings').item.json.sender_name }}"}, {"name": "mail_id", "stringValue": "={{ $('Settings').item.json.mail_id }}"}, {"name": "mail_seq", "stringValue": "0"}]}, "include": "none", "options": {}}, "typeVersion": 3.2}, {"id": "7ff4eabc-f49a-4adc-9a4b-750585b72070", "name": "Email sequence", "type": "n8n-nodes-base.set", "position": [1000, 140], "parameters": {"mode": "raw", "options": {}, "jsonOutput": "{\n  \"emails\": [\n    {\n      \"message\": \"Hi {name}, hope you're well!<br />\\n<br />\\nYou're doing some great things at {company}, and I wanted to touch base to see if you wanted to chat.<br />\\n<br />\\nWould it make sense to jump on a quick call?<br />\\n<br />\\nRegards,<br />\\n<br />\\nNathan<br />\\n\",\n      \"send_on_day\": 0\n    },\n    {\n      \"message\": \"Hi {name},<br />\\n<br />\\nJust wanted to follow up on this, since it would be great to talk.<br />\\n<br />\\nRegards,<br />\\n<br />\\nNathan<br />\\n\",\n      \"send_on_day\": 3\n    },\n    {\n      \"message\": \"Just thought I'd give this one last try :)<br />\\n<br />\\nNathan\\n\",\n      \"send_on_day\": 8\n    }\n  ]\n}\n"}, "typeVersion": 3.2}, {"id": "7b038199-cf02-4536-a351-b86d51b0d367", "name": "Fill message placeholders", "type": "n8n-nodes-base.code", "position": [1720, 1120], "parameters": {"mode": "runOnceForEachItem", "jsCode": "function extractPlaceholders(str) {\n    // Regular expression to match placeholders\n    // It matches any alphanumeric character including dashes and underscores between {}\n    const regex = /\\{([a-zA-Z0-9_-]+)\\}/g;\n    \n    // Set to store unique placeholders\n    const uniquePlaceholders = new Set();\n\n    // Extract and store unique placeholders\n    let match;\n    while ((match = regex.exec(str)) !== null) {\n        uniquePlaceholders.add(match[1]);\n    }\n\n    // Convert the Set to an array and return\n    return Array.from(uniquePlaceholders);\n}\n\nlet placeholders = Object.keys(item.json.placeholders)\nconsole.log(placeholders)\n\n// Substitute all the placeholders in the message\n  item.json.message = item.json.message_template\n  for (let key of extractPlaceholders(item.json.message_template)) {\n    if(!placeholders.includes(key)) throw new Error(`Missing data for placeholder '{${key}}'`)\n    const regex = new RegExp(`\\\\{${key}\\\\}`, 'g'); // Create a regex to match the exact word surrounded by {}\n    item.json.message = item.json.message.replaceAll(regex, item.json.placeholders[key]);\n  }\n\nreturn item"}, "typeVersion": 2}, {"id": "42fe4448-1a44-47aa-a04b-927d441b265a", "name": "Compose message", "type": "n8n-nodes-base.set", "position": [1940, 1120], "parameters": {"fields": {"values": [{"name": "message", "stringValue": "=<span data-cam='{{ $json.mail_id }}' data-seq='{{ $json.mail_seq }}' data-ph='{{ JSON.stringify($json.placeholders) }}'></span>{{ $json.message }}"}]}, "options": {}}, "typeVersion": 3.2}, {"id": "bccf2e89-852e-49b4-ad98-194008c47760", "name": "Get previous message threads", "type": "n8n-nodes-base.gmail", "position": [1280, 620], "parameters": {"filters": {"q": "=subject:{{ $json.subject }} after:{{ $now.minus({'days': $json.emails.last().send_on_day+1}).toSQL().substr(0, 10) }}"}, "resource": "thread", "returnAll": true}, "credentials": {"gmailOAuth2": {"id": "198", "name": "Gmail account (David)"}}, "typeVersion": 2.1}, {"id": "3ce6c45f-a257-4270-a84d-6a19ec35b2eb", "name": "Get thread details", "type": "n8n-nodes-base.gmail", "position": [1500, 620], "parameters": {"simple": false, "options": {}, "resource": "thread", "threadId": "={{ $json.id }}", "operation": "get"}, "credentials": {"gmailOAuth2": {"id": "198", "name": "Gmail account (David)"}}, "typeVersion": 2}, {"id": "9224bb16-fbc2-45b5-a2cb-f63cb440f46f", "name": "Classify threads", "type": "n8n-nodes-base.code", "position": [1940, 620], "parameters": {"jsCode": "// Because emails are sent slightly after the schedule trigger runs, we'll end up waiting an extra day to send unless we take into account the execution time of the workflow\nlet buffer_mins = 20\n\nlet templates = $('Email sequence').first().json.emails\n\nfunction next_sequence_number(messages, mail_id, sender_name) {\n  for (let i = 0; i < messages.length; i++) {\n    if(!('html' in messages[i])) return -1;\n    let in_campaign = messages[i].html.includes(\"data-cam='\"+mail_id+\"'\")\n    let valid_seq = messages[i].html.includes(\"data-seq='\"+i+\"'\")\n    let from_us = messages[i].From.includes(sender_name)\n    console.log(in_campaign + \", \" + valid_seq + \", \" + from_us)\n    if(!(from_us && in_campaign && valid_seq)) {\n      return -1;\n    }\n  }\n  return messages.length;\n}\n\n\nfor (const item of $input.all()) {\n  item.json.first_message_at = DateTime.fromMillis($('Get thread details').item.json.messages[0].internalDate*1)\n  item.json.days_since_first_message = DateTime.now().diff(item.json.first_message_at, 'days').days\n  item.json.next_sequence_number = next_sequence_number(\n    item.json.messages,\n    $('Settings').first().json.mail_id,\n    $('Settings').first().json.sender_name\n  );\n  item.json.next_message_due = (\n    item.json.next_sequence_number > 0\n    && item.json.next_sequence_number < templates.length\n    && templates[item.json.next_sequence_number].send_on_day <= item.json.days_since_first_message + (buffer_mins/60/24)\n  )\n\n  // Retrieve the placeholder values from the snippet, for use in future messages\n  const ph_matches = item.json.messages[0].snippet.match(/data-ph='([^']*)'/)\n  if(ph_matches?.length > 1) {\n    const placeholders = JSON.parse(ph_matches[1])\n    for(key of placeholders.keys()) {\n      item.json[key] = placeholders[key]\n    }\n  }\n\n}\n\nreturn $input.all();"}, "typeVersion": 2}, {"id": "776cb743-339d-49f6-af3c-9ae2b464d01a", "name": "Next message due?", "type": "n8n-nodes-base.filter", "position": [2160, 620], "parameters": {"options": {}, "conditions": {"options": {"leftValue": "", "caseSensitive": true, "typeValidation": "strict"}, "combinator": "and", "conditions": [{"id": "00cf6401-f45a-4496-803c-70a5b2d7daf5", "operator": {"type": "boolean", "operation": "true", "singleValue": true}, "leftValue": "={{ $json.next_message_due }}", "rightValue": ""}]}}, "typeVersion": 2}, {"id": "2ecf68b5-f5bf-4961-a849-7c0d29940387", "name": "Sticky Note2", "type": "n8n-nodes-base.stickyNote", "position": [1906, 427], "parameters": {"color": 7, "width": 181.66573318934627, "height": 344.96230939963334, "content": "Follow-up is due if:\n- All the messages in the thread are automated (no-one has replied yet)\n- Enough time has passed for the next message to be sent"}, "typeVersion": 1}, {"id": "a3a78abb-0691-4152-a349-658b8286df2f", "name": "Execute Workflow Trigger", "type": "n8n-nodes-base.executeWorkflowTrigger", "position": [1280, 1120], "parameters": {}, "typeVersion": 1}, {"id": "a62bff23-2742-4a5e-8896-e1a3be5915fd", "name": "Replying?", "type": "n8n-nodes-base.if", "position": [2160, 1120], "parameters": {"options": {}, "conditions": {"options": {"leftValue": "", "caseSensitive": true, "typeValidation": "strict"}, "combinator": "and", "conditions": [{"id": "dc8ec88f-daef-46be-b3da-1407d5e1c0b1", "operator": {"type": "string", "operation": "exists", "singleValue": true}, "leftValue": "={{ $json.reply_message_id }}", "rightValue": ""}]}}, "typeVersion": 2}, {"id": "76d25df2-4472-40a6-80c6-f2e3dc8702a3", "name": "Send new message", "type": "n8n-nodes-base.gmail", "position": [2380, 1240], "parameters": {"sendTo": "={{ $json.to_email }}", "message": "={{ $json.message }}", "options": {"senderName": "={{ $json.sender_name }}", "appendAttribution": false}, "subject": "={{ $json.subject }}"}, "credentials": {"gmailOAuth2": {"id": "198", "name": "Gmail account (David)"}}, "typeVersion": 2.1}, {"id": "ceefaf78-28b8-4711-b50e-b5487862dba6", "name": "Call message send sub-workflow", "type": "n8n-nodes-base.executeWorkflow", "position": [2820, 620], "parameters": {"options": {}, "workflowId": "={{ $workflow.id }}"}, "typeVersion": 1}, {"id": "809e9df8-881a-4b32-a3c0-e55c669bd8d1", "name": "Prepare reply params", "type": "n8n-nodes-base.set", "position": [2380, 620], "parameters": {"fields": {"values": [{"name": "message_template", "stringValue": "={{ $('Email sequence').first().json.emails[$json.next_sequence_number].message }}"}, {"name": "reply_message_id", "stringValue": "={{ $json.messages.last().id }}"}, {"name": "sender_name", "stringValue": "={{ $('Settings').item.json.sender_name }}"}, {"name": "mail_id", "stringValue": "={{ $('Settings').item.json.mail_id }}"}, {"name": "mail_seq", "stringValue": "={{ $json.next_sequence_number }}"}, {"name": "to", "stringValue": "={{ $json.messages[0].To }}"}]}, "include": "none", "options": {}}, "typeVersion": 3.2}, {"id": "cdda96f1-e0a2-4ce8-bc78-da8e80f7029f", "name": "Prepare first message params", "type": "n8n-nodes-base.set", "position": [1720, 140], "parameters": {"fields": {"values": [{"name": "message_template", "stringValue": "={{ $('Email sequence').first().json.emails[0].message }}"}, {"name": "to_email", "stringValue": "={{ $('Get emails').item.json[$('Settings').item.json.email_column_name] }}"}, {"name": "subject", "stringValue": "={{ $('Settings').item.json.subject }}"}, {"name": "sender_name", "stringValue": "={{ $('Settings').item.json.sender_name }}"}, {"name": "mail_id", "stringValue": "={{ $('Settings').item.json.mail_id }}"}, {"name": "mail_seq", "stringValue": "0"}]}, "options": {}}, "typeVersion": 3.2}, {"id": "c2d9869e-0608-472a-a124-26e9e6f1820a", "name": "Sticky Note4", "type": "n8n-nodes-base.stickyNote", "position": [1240, -100], "parameters": {"color": 7, "width": 181.66573318934627, "height": 410.4105111871959, "content": "Columns the sheet needs\n- email\n- first_emailed (leave blank - will be filled in automatically)\n- Other columns matching placeholders in email sequence"}, "typeVersion": 1}, {"id": "26bc2c58-fea5-4ee0-b9ea-264ad00e8d32", "name": "Call message send sub-workflow1", "type": "n8n-nodes-base.executeWorkflow", "position": [2160, 140], "parameters": {"mode": "each", "options": {}, "workflowId": "={{ $workflow.id }}"}, "typeVersion": 1}, {"id": "e7e7d9bd-79c6-4534-b88d-b54cc695c7bf", "name": "To email?", "type": "n8n-nodes-base.filter", "position": [1500, 140], "parameters": {"options": {}, "conditions": {"options": {"leftValue": "", "caseSensitive": true, "typeValidation": "strict"}, "combinator": "and", "conditions": [{"id": "eeec5901-5ff0-47b1-926b-e93097d64434", "operator": {"type": "boolean", "operation": "true", "singleValue": true}, "leftValue": "={{ $json.first_emailed.isEmpty() }}", "rightValue": ""}]}}, "typeVersion": 2}, {"id": "db4b6481-5fdb-4bc3-a10f-b6ccfb5b0bf0", "name": "Decode messages", "type": "n8n-nodes-base.code", "position": [1720, 620], "parameters": {"jsCode": "// TODO: Some messages have an empty payload and a parts field instead (containing an array)\n\nfor (const item of $input.all()) {\n  for (const message of item.json.messages) {\n    console.log('message', message.payload.body.data || \"\")\n    let buffer = Buffer.from(message.payload.body.data || \"\", \"base64\");\n    message.html = buffer.toString(\"utf8\")\n  }\n}\n\nreturn $input.all();"}, "typeVersion": 2}, {"id": "fc4868f0-845d-4f76-a566-b0db3d2676f8", "name": "Decode placeholder values", "type": "n8n-nodes-base.code", "position": [2600, 620], "parameters": {"mode": "runOnceForEachItem", "jsCode": "const html = $('Decode messages').item.json.messages[0].html\nconst matches = html.match(/data-ph='([^']*)'/)\nlet placeholders = {}\nif(matches?.length > 0) {\n  ph = JSON.parse(matches[1])\n  for(k of Object.keys(ph)) {\n    placeholders[k] = ph[k]\n  }\n}\nitem.json.placeholders = placeholders\n\nreturn item;"}, "typeVersion": 2}, {"id": "5af9b08e-6c5d-4701-a44a-794e96216948", "name": "Package placeholder values", "type": "n8n-nodes-base.code", "position": [1940, 140], "parameters": {"mode": "runOnceForEachItem", "jsCode": "function extractPlaceholders(str) {\n    // Regular expression to match placeholders\n    // It matches any alphanumeric character including dashes and underscores between {}\n    const regex = /\\{([a-zA-Z0-9_-]+)\\}/g;\n    \n    // Set to store unique placeholders\n    const uniquePlaceholders = new Set();\n\n    // Extract and store unique placeholders\n    let match;\n    while ((match = regex.exec(str)) !== null) {\n        uniquePlaceholders.add(match[1]);\n    }\n\n    // Convert the Set to an array and return\n    return Array.from(uniquePlaceholders);\n}\n\n\n// Gather all the placeholder values for passing on\nconst all_ph_raw = $('Email sequence').first().json.emails.flatMap(e => extractPlaceholders(e.message))\nconst all_ph = [...new Set(all_ph_raw)];\nlet placeholders = {}\nfor(ph of all_ph) {\n  if($('Get emails').item.json[ph] == undefined) throw new Error(`Message placeholder '{${ph}}' requires a column called '${ph}' in the Google Sheet`)\n  placeholders[ph] = $('Get emails').item.json[ph]\n}\n\nitem.json.placeholders = placeholders\n\nreturn item;"}, "typeVersion": 2}, {"id": "e655a9c2-617b-4119-9582-45f1db2cc6d2", "name": "Settings", "type": "n8n-nodes-base.set", "position": [780, 140], "parameters": {"options": {}, "assignments": {"assignments": [{"id": "5e327a1d-3f2e-40f1-aaa1-9ce888349eb0", "name": "sheet_url", "type": "string", "value": "https://docs.google.com/spreadsheets/d/12dsbRpvtVFDdPmyZ7-39vuHuFpM1eMyfOqGGGdsnrtc/edit#gid=0"}, {"id": "3255270a-3ac2-4c59-8215-ea79256b55cc", "name": "subject", "type": "string", "value": "My amazing campaign"}, {"id": "76b40b74-acef-49f1-a0e2-0be9a461319a", "name": "sender_name", "type": "string", "value": "Nathan Automat"}, {"id": "4532eb84-5ebc-4011-8c65-d97aeae21256", "name": "email_column_name", "type": "string", "value": "email"}, {"id": "83de0ceb-39ec-426a-afba-13d66bce101d", "name": "mail_id", "type": "string", "value": "123456"}]}}, "typeVersion": 3.3}, {"id": "a8975f91-6413-448b-bc3f-1084959b8b31", "name": "Reply to message", "type": "n8n-nodes-base.gmail", "position": [2380, 1020], "parameters": {"message": "={{ $json.message }}", "options": {"senderName": "David Roberts"}, "messageId": "={{ $json.reply_message_id }}", "operation": "reply"}, "credentials": {"gmailOAuth2": {"id": "198", "name": "Gmail account (David)"}}, "typeVersion": 2}, {"id": "d453661e-25f7-471c-90dc-633270f14396", "name": "Get emails", "type": "n8n-nodes-base.googleSheets", "position": [1280, 140], "parameters": {"options": {}, "sheetName": {"__rl": true, "mode": "url", "value": "={{ $('Settings').item.json.sheet_url }}"}, "documentId": {"__rl": true, "mode": "url", "value": "={{ $('Settings').item.json.sheet_url }}"}}, "credentials": {"googleSheetsOAuth2Api": {"id": "196", "name": "Google Sheets account (David)"}}, "typeVersion": 4.2}, {"id": "7a838728-38e1-45f9-8bac-19c6ad005a38", "name": "Sticky Note5", "type": "n8n-nodes-base.stickyNote", "position": [1220, -180], "parameters": {"color": 7, "width": 1790.5345476157208, "height": 515.1374038700677, "content": "## Send initial emails"}, "typeVersion": 1}, {"id": "5d8823c1-00a7-43a2-963d-90e971167ef8", "name": "Sticky Note6", "type": "n8n-nodes-base.stickyNote", "position": [1220, 360], "parameters": {"color": 7, "width": 1797.4980261229769, "height": 515.1374038700677, "content": "## Send follow-up emails if appropriate"}, "typeVersion": 1}, {"id": "fd2bb0b2-a313-45ed-ad58-935d803237e5", "name": "Sticky Note7", "type": "n8n-nodes-base.stickyNote", "position": [1220, 920], "parameters": {"color": 7, "width": 1797.4980261229769, "height": 515.1374038700677, "content": "## Sub-workflow for sending the emails\nThis is called by the sections above - you shouldn't need to touch it"}, "typeVersion": 1}, {"id": "be4a4bbb-1e10-4c9e-afb9-cc4a46a78113", "name": "Every hour", "type": "n8n-nodes-base.scheduleTrigger", "position": [320, 140], "parameters": {"rule": {"interval": [{"field": "hours", "triggerAtMinute": 12}]}}, "typeVersion": 1.1}, {"id": "be582e38-6da2-4c64-8804-981936f71d88", "name": "Sticky Note3", "type": "n8n-nodes-base.stickyNote", "position": [2120, 958], "parameters": {"color": 7, "width": 181.66573318934627, "height": 306.5470605243249, "content": "If reply_message_id is set, will reply to that message.\n\nOtherwise, will send a new message to the user in the 'email' field"}, "typeVersion": 1}, {"id": "88e9ff03-62f0-4dcf-9e28-62c95386df66", "name": "Don't email on weekends", "type": "n8n-nodes-base.filter", "position": [540, 140], "parameters": {"options": {}, "conditions": {"options": {"leftValue": "", "caseSensitive": true, "typeValidation": "strict"}, "combinator": "and", "conditions": [{"id": "195ce0cf-9d25-4e02-9f20-aa6edbc2d561", "operator": {"type": "boolean", "operation": "false", "singleValue": true}, "leftValue": "={{ $now.isWeekend() }}", "rightValue": ""}]}}, "typeVersion": 2}, {"id": "7a5822f3-b2ea-42d7-8034-21a92e283112", "name": "Sticky Note8", "type": "n8n-nodes-base.stickyNote", "position": [740, -120], "parameters": {"width": 404.04123613412946, "height": 418.96364526464185, "content": "# Try me out\n1. Clone [this Google worksheet](https://docs.google.com/spreadsheets/d/12dsbRpvtVFDdPmyZ7-39vuHuFpM1eMyfOqGGGdsnrtc/edit#gid=0) and update the 'Settings' node with its URL (plus change any other settings there you need to)\n2. Adjust the sequence of emails you want to send in the 'Email Sequence' node\n\nMake sure you set how many days after the previous email to wait before sending, and note that the emails are in HTML format."}, "typeVersion": 1}], "pinData": {}, "connections": {"Settings": {"main": [[{"node": "Email sequence", "type": "main", "index": 0}]]}, "Replying?": {"main": [[{"node": "Reply to message", "type": "main", "index": 0}], [{"node": "Send new message", "type": "main", "index": 0}]]}, "To email?": {"main": [[{"node": "Prepare first message params", "type": "main", "index": 0}]]}, "Every hour": {"main": [[{"node": "Don't email on weekends", "type": "main", "index": 0}]]}, "Get emails": {"main": [[{"node": "To email?", "type": "main", "index": 0}]]}, "Email sequence": {"main": [[{"node": "Get previous message threads", "type": "main", "index": 0}, {"node": "Get emails", "type": "main", "index": 0}]]}, "Compose message": {"main": [[{"node": "Replying?", "type": "main", "index": 0}]]}, "Decode messages": {"main": [[{"node": "Classify threads", "type": "main", "index": 0}]]}, "Classify threads": {"main": [[{"node": "Next message due?", "type": "main", "index": 0}]]}, "Next message due?": {"main": [[{"node": "Prepare reply params", "type": "main", "index": 0}]]}, "Get thread details": {"main": [[{"node": "Decode messages", "type": "main", "index": 0}]]}, "Prepare reply params": {"main": [[{"node": "Decode placeholder values", "type": "main", "index": 0}]]}, "Set message template": {"main": [[{"node": "Fill message placeholders", "type": "main", "index": 0}]]}, "Don't email on weekends": {"main": [[{"node": "Settings", "type": "main", "index": 0}]]}, "Execute Workflow Trigger": {"main": [[{"node": "Set message template", "type": "main", "index": 0}]]}, "Decode placeholder values": {"main": [[{"node": "Call message send sub-workflow", "type": "main", "index": 0}]]}, "Fill message placeholders": {"main": [[{"node": "Compose message", "type": "main", "index": 0}]]}, "Package placeholder values": {"main": [[{"node": "Call message send sub-workflow1", "type": "main", "index": 0}]]}, "Get previous message threads": {"main": [[{"node": "Get thread details", "type": "main", "index": 0}]]}, "Prepare first message params": {"main": [[{"node": "Package placeholder values", "type": "main", "index": 0}]]}, "Call message send sub-workflow1": {"main": [[{"node": "Update last contacted time", "type": "main", "index": 0}]]}}}