customer.archived

The message id — stable across retries of the same message. Deduplicate on the body’s id (the signal id), not on this: an endpoint whose api_version changes while a signal is being retried can receive that signal once per version, as two messages with two message ids.

When this attempt was sent, in Unix seconds.

Signature over the id, timestamp and raw body, made with your endpoint’s secret. Verify it with any Standard Webhooks library before trusting the payload.