loopback/test/fixtures/access-control/common/models/bank.json

{
  "name": "bank",
  "relations": {
    "users": {
      "model": "user",
      "type": "hasMany"
    },
    "accounts": {
      "model": "account",
      "type": "hasMany"
    }
  },
  "acls": [
    {
      "accessType": "*",
      "permission": "DENY",
      "principalType": "ROLE",
      "principalId": "$everyone"
    },
    {
      "accessType": "READ",
      "permission": "ALLOW",
      "principalType": "ROLE",
      "principalId": "$everyone"
    },
    {
      "accessType": "WRITE",
      "permission": "ALLOW",
      "principalType": "ROLE",
      "principalId": "$dynamic-role"
    }
  ],
  "properties": {}
}