SmsMessage

{
    "destinations": [
        {
            "destination": "string",
            "messageId": "string",
            "sourceAddress": "string"
        }
    ],
    "callbackData": "string",
    "deliveryTimeWindow": {
        "days": [
            "MONDAY"
        ],
        "from": {
            "hour": 0,
            "minute": 0
        },
        "to": {
            "hour": 0,
            "minute": 0
        }
    },
    "text": "string",
    "entityId": "string",
    "sendAt": "2019-08-24T14:15:22.123Z",
    "validityPeriodMinutes": 0,
    "priority": 0
}