QueueItemRequest(Queue Item Request)

{
    "responder_channel_identifier": "test@esat.com",
    "locale": null,
    "send_time": "2018-01-01T00:00:00+03:00",
    "metadata": {
        "questionnaire": {
            "q_meta_name": "q_meta_value"
        },
        "responder": {
            "resp_meta_name": "resp_meta_value"
        }
    }
}