[
    {
        "uid": { "type": "User", "id": "bob"} ,
        "attrs": { },
        "parents": []
    },
    {
        "uid": { "type": "Action", "id": "view"},
        "attrs": {},
        "parents": []
    },
    {
        "uid": { "type": "Photo", "id": "VacationPhoto94.jpg"},
        "attrs": {
            "owner": {"__entity": {"type": "User", "id": "bob"}}
        },
        "parents": []
    }
]