{
  "name": "Message",
  "base": "MyModel",
  "validateUpsert": true,
  "properties": {
    "id": {
      "type": "Number",
      "id": true,
      "description": "Identifier"
    },
    "uuid":{
        "type": "String"
    },
    "sender":{
        "type": "String"
    },
    "recipient":{
        "type": "String"
    },
    "message":{
        "type": "String"
    },
    "sendDate":{
        "type": "date"
    }
  },
  "acls": [
    {
      "accessType": "*",
      "principalType": "ROLE",
      "principalId": "$everyone",
      "permission": "DENY"
    },
    {
      "accessType": "*",
      "principalType": "ROLE",
      "principalId": "root",
      "permission": "ALLOW"
    }
  ]
}