Task: Create an event in PostHog when a request is made to a webhook URL

n8n workflow JSON:
{"nodes":[{"name":"PostHog","type":"n8n-nodes-base.postHog","position":[640,280],"parameters":{"eventName":"={{$json[\"query\"][\"event\"]}}","distinctId":"n8n","additionalFields":{}},"credentials":{"postHogApi":"PostHog Credentials"},"typeVersion":1},{"name":"Webhook","type":"n8n-nodes-base.webhook","position":[440,280],"webhookId":"f6d0071e-3cf9-49fd-8bbd-afdbea6b0c67","parameters":{"path":"f6d0071e-3cf9-49fd-8bbd-afdbea6b0c67","options":{}},"typeVersion":1}],"connections":{"Webhook":{"main":[[{"node":"PostHog","type":"main","index":0}]]}}}