Sends a test event to the specified webhook endpoint. Use this to verify your endpoint is reachable and correctly processing events.
API key passed as a Bearer token. Format: ld_<env>_<prefix>_<secret> where <env> is test or live.
The webhook ID (prefixed with whk_).
"whk_bcd890"
Arbitrary event payload to send as a test. Structure it like a real webhook event for the most accurate test.