[
  {
    "uid": { "__entity": { "type": "User", "id": "Eric"} },
    "attrs": {},
    "parents": []
  },
  {
    "uid": { "__entity": { "type": "User", "id": "Mike"} },
    "attrs": {},
    "parents": []
  },
  {
    "uid": { "__entity": { "type": "Box", "id": "1"} },
    "attrs": {
      "owner": {
        "__entity": { "type": "User", "id": "Eric"}
      }
    },
    "parents": []
  },
  {
    "uid": { "__entity": { "type": "Box", "id": "2"} },
    "attrs": {
      "owner": {
        "__entity": { "type": "User", "id": "Mike"}
      }
    },
    "parents": []
  }
]