Task: Receive updates when a subscriber unsubscribes in Customer.io

n8n workflow JSON:
{"id":"29","name":"Receive updates when a subscriber unsubscribes in Customer.io","nodes":[{"name":"Customer.io Trigger","type":"n8n-nodes-base.customerIoTrigger","position":[650,260],"webhookId":"88092579-1b8d-4d44-98d5-f24b3579cbc2","parameters":{"events":["customer.unsubscribed"]},"credentials":{"customerIoApi":"customerIO"},"typeVersion":1}],"active":false,"settings":{},"connections":{}}