The phone_number.attached_to_campaign event is delivered whenever a phone number is attached to a campaign.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
The ID of the account in which this event occurred
The data associated with the event
The timestamp when this event occurred, in ISO8601 format
The type of the event. Always phone_number.attached_to_campaign for this event.
"phone_number.attached_to_campaign"Return a 200 status to indicate that the data was received successfully