JSON sent: {"app_id":"669166da-18f7-43a0-ba74-5c591d4c8c62","included_segments":["All"],"data":{"foo":"bar"},"contents":{"en":"English Message"}}

JSON received:
{"allresponses":"{\"id\":\"a9fc69e2-695b-41c7-821d-bf41da36495e\",\"recipients\":1}"}