Task: Receive updates on a subscriber added in ConvertKit

n8n workflow JSON:
{"id":"28","name":"Receive updates when a subscriber is added through a form in ConvertKit","nodes":[{"name":"ConvertKit Trigger","type":"n8n-nodes-base.convertKitTrigger","position":[690,260],"webhookId":"55336480-7be1-4432-8fc8-d860572c1c18","parameters":{"event":"formSubscribe","formId":1657198},"credentials":{"convertKitApi":"convertkit"},"typeVersion":1}],"active":false,"settings":{},"connections":{}}