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

JSON received:
{"allresponses":"{\"id\":\"b9fd0a99-12d2-4431-ae6c-9fd99a531322\",\"recipients\":1}"}