Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.
The ID of the campaign to test-send
The ID of the customer to test-send the campaign to
The email address to test-send the campaign to
The phone number to test-send the campaign to
The variables to test-send the campaign with
The ID of the email address to use as the sending address (overrides the campaign's configured email address)
The ID of the phone number to use as the sending phone number (overrides the campaign's configured phone number)
Whether the test-send was successful
The response is of type object.