api.v1alpha1.room303.CreateMessageResponse(CreateMessageResponse)

{
    "message": {
        "org_id": "string",
        "message_id": "string",
        "room_id": "string",
        "from_user": {
            "user_id": "string",
            "full_name": "string",
            "display_name": "string"
        },
        "status": "MESSAGE_STATUS_ACTIVE",
        "received_at": "1s",
        "updated_at": "1s",
        "payload": "string",
        "unread": true,
        "nonce": "string"
    }
}