Timestamp of when the webhook destination was created.
{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/aaa_created_at", "title": "aaa_created_at", "description": "Timestamp of when the webhook destination was created.", "example": "2020-10-26T18:25:04.532316Z", "format": "date-time", "readOnly": true, "type": "string" }