Task: Create Mautic contact on a new Shopify customer

n8n workflow JSON:
{"meta":{"instanceId":"237600ca44303ce91fa31ee72babcdc8493f55ee2c0e8aa2b78b3b4ce6f70bd9"},"nodes":[{"id":"a5f74e05-acea-4ff4-b3b2-5997850be036","name":"On new customer","type":"n8n-nodes-base.shopifyTrigger","position":[180,420],"webhookId":"8efd263c-73fb-481b-90d8-8ae0db929548","parameters":{"topic":"customers/create","authentication":"accessToken"},"credentials":{"shopifyAccessTokenApi":{"id":"37","name":"[UPDATE ME]"}},"typeVersion":1},{"id":"5b4a9e71-3aa7-40d8-a439-79a504c60a46","name":"Create contact","type":"n8n-nodes-base.mautic","position":[400,420],"parameters":{"email":"={{$node[\"On new customer\"].json[\"email\"]}}","options":{},"lastName":"={{$node[\"On new customer\"].json[\"last_name\"]}}","firstName":"={{$node[\"On new customer\"].json[\"first_name\"]}}","additionalFields":{}},"credentials":{"mauticApi":{"id":"34","name":"[UPDATE ME]"}},"typeVersion":1},{"id":"4b7b306e-1b4c-464f-b8f0-373167ded16f","name":"Note","type":"n8n-nodes-base.stickyNote","position":[400,600],"parameters":{"width":332,"height":116,"content":"### Add more fields to Mautic\nBy default, the first name, last name and email are pushed to Mautic. If you require more fields, add it in the `Create contact` node."},"typeVersion":1}],"connections":{"On new customer":{"main":[[{"node":"Create contact","type":"main","index":0}]]}}}