MessageEvent

{
    "event": "string",
    "organization_id": 0,
    "message": {
        "id": "string",
        "type": "inbound",
        "content": "string",
        "wam_id": "string",
        "created_at": "string"
    },
    "contact": {
        "uuid": "string",
        "name": "string",
        "phone": "string"
    }
}