Requires authentication — see Authentication.

Updates some information from an existing Broadcast identified by its unique ID.

The Update Broadcast method is used to configure the delivery dates of Broadcasts with Pending status.

This endpoint only modifies a Broadcast that already exists — it does not create one. The initial status (Now, Scheduled, or Pending) is set when the Broadcast is created; see the Scheduling status section on Create Broadcast. Use Update Broadcast only to change the delivery date of a Broadcast that is already in Pending status.