Task: Receive updates when a sale is made in Gumroad

n8n workflow JSON:
{"id":"34","name":"Receive updates when a sale is made in Gumroad","nodes":[{"name":"Gumroad Trigger","type":"n8n-nodes-base.gumroadTrigger","position":[1310,700],"webhookId":"d72f9547-0530-4733-9e8b-3e3b1beec2eb","parameters":{"resource":"sale"},"credentials":{"gumroadApi":"gumroad"},"typeVersion":1}],"active":false,"settings":{},"connections":{}}