api.commons.OmniMessage(OmniMessage)

{
    "message_sid": 0,
    "user_id": "string",
    "sent_from": "string",
    "sent_to": "string",
    "channel_type": "CHANNEL_TYPE_EMAIL",
    "reference_id": "string",
    "ui_reference_id": "string",
    "payload": {
        "assign_conversation": {
            "user_id": "string",
            "user_name": "string",
            "primary_asm_session_sid": 0
        }
    },
    "conversation_sid": {
        "value": 0
    },
    "status": "OMNI_MESSAGE_CREATED",
    "date_created": "1s",
    "date_modified": "1s",
    "campaign_sid": 0,
    "subject": "string",
    "sender_type": "OMNI_SENDER_TYPE_AGENT",
    "status_message": "string",
    "message_format": "MESSAGE_FORMAT_UNSPECIFIED"
}