Task: Typeform to Kizeoforms to Letterxpress (Letter/Parcel) Service

n8n workflow:
{"id":"23","name":"Typeform to Letterexpress","nodes":[{"name":"HTTP Request","type":"n8n-nodes-base.httpRequest","notes":"Token","position":[390,130],"parameters":{"url":"https://www.kizeoforms.com/rest/v3/login","options":{},"requestMethod":"POST","bodyParametersUi":{"parameter":[{"name":"user"},{"name":"password"},{"name":"company"}]}},"typeVersion":1},{"name":"POST Form Inhalt","type":"n8n-nodes-base.httpRequest","position":[570,130],"parameters":{"url":"https://www.kizeoforms.com/rest/v3/forms/<idofforms>622167/push","options":{},"requestMethod":"POST","jsonParameters":true,"bodyParametersJson":"={\n  \"recipient_user_id\": <hereuserid>,\n  \"fields\": {\n    \"name\": {\n      \"value\": \"{{$node[\"Typeform Trigger\"].json[\"Ihr Name\"]}}\"\n    },\n      \"vorname\": {\n      \"value\": \"{{$node[\"Typeform Trigger\"].json[\"Ihr Vorname\"]}}\"\n    },\n\"strasse\": {\n\"value\": \"{{$node[\"Typeform Trigger\"].json[\"Straße\"]}}\"\n},\n\"plz\": {\n\"value\": \"{{$node[\"Typeform Trigger\"].json[\"PLZ\"]}}\"\n},\n\"ort\": {\n\"value\": \"{{$node[\"Typeform Trigger\"].json[\"Ort\"]}}\"\n},\n\"datum\": {\n\"value\": \"24/03/2020\"\n}\n}\n}","headerParametersJson":"={\"Authorization\":\"{{$node[\"HTTP Request\"].json[\"data\"][\"token\"]}}\"}"},"typeVersion":1},{"name":"GET PDF","type":"n8n-nodes-base.httpRequest","position":[750,130],"parameters":{"url":"=https://www.kizeoforms.com/rest/v3/forms/<idform>/data/{{$node[\"POST Form Inhalt\"].json[\"data\"][\"data_id\"]}}/exports/<dataid>/pdf","options":{},"responseFormat":"file","headerParametersUi":{"parameter":[{"name":"Authorization","value":"={{$node[\"HTTP Request\"].json[\"data\"][\"token\"]}}"}]}},"typeVersion":1},{"name":"Crypto","type":"n8n-nodes-base.crypto","position":[1150,130],"parameters":{"value":"={{$node[\"Function\"].json[\"data\"]}}","dataPropertyName":"datachecksum"},"typeVersion":1},{"name":"Typeform Trigger","type":"n8n-nodes-base.typeformTrigger","position":[190,130],"parameters":{"formId":"kuKnkM"},"credentials":{"typeformApi":"Typeform"},"typeVersion":1},{"name":"Function","type":"n8n-nodes-base.function","position":[920,130],"parameters":{"functionCode":"return [\n  {\n    json: {\n      data: items[0].binary.data.data,\n    }\n  }\n]"},"typeVersion":1},{"name":"LETTEREXPRESS SET Job","type":"n8n-nodes-base.httpRequest","position":[1340,130],"parameters":{"url":"https://sandbox.letterxpress.de/v1/setJob","options":{"bodyContentType":"raw","bodyContentCustomMimeType":"application/json"},"requestMethod":"POST","jsonParameters":true,"responseFormat":"string","bodyParametersJson":"={\"auth\": {\n\"username\":\"<username>\",\n\"apikey\":\"<apikey>\"\n}\n,\n\"letter\":{ \n\"base64_file\": \"{{$node[\"Function\"].json[\"data\"]}}\",\n\"base64_checksum\": \"{{$node[\"Crypto\"].json[\"datachecksum\"]}}\",\n\"address\": \"\",\"dispatchdate\": \"25.03.2020\",\n\"specification\":{ \"color\":\"1\", \"mode\":\"simplex\",\"ship\":\"national\"}\n}}","allowUnauthorizedCerts":true},"typeVersion":1},{"name":"Function1","type":"n8n-nodes-base.function","position":[380,420],"parameters":{"functionCode":"items[0].json.myVariable = new Date();\nreturn items;"},"typeVersion":1},{"name":"Date & Time","type":"n8n-nodes-base.dateTime","position":[530,420],"parameters":{"value":"={{$node[\"Function1\"].json[\"myVariable\"]}}","custom":true,"options":{},"toFormat":"DD.MM.YYYY","dataPropertyName":"datumfeld"},"typeVersion":1}],"active":false,"settings":{},"connections":{"Crypto":{"main":[[{"node":"LETTEREXPRESS SET Job","type":"main","index":0}]]},"GET PDF":{"main":[[{"node":"Function","type":"main","index":0}]]},"Function":{"main":[[{"node":"Crypto","type":"main","index":0}]]},"Function1":{"main":[[{"node":"Date & Time","type":"main","index":0}]]},"HTTP Request":{"main":[[{"node":"POST Form Inhalt","type":"main","index":0}]]},"POST Form Inhalt":{"main":[[{"node":"GET PDF","type":"main","index":0}]]},"Typeform Trigger":{"main":[[{"node":"HTTP Request","type":"main","index":0}]]}}}