The URL of your webhook endpoint. Must be a valid URL.
The entity type that this subscription is for. Valid values are: "lead", "person", "company", "opportunity", "project", "task".
The event that will trigger notifications for this subscription. Valid values are: "new", "update", "delete".
JSON containing custom key/value pairs that are sent as-is with every notification. Using this secret, your notification endpoint can authenticate the request to make sure it is coming from a trusted source.
If provided and set to true, dropdown custom fields (standard and multi-select) will have their option_ids converted to the option names.