{
    "_id" : ObjectId("4f7486c6318ca0fafa7761d0"),
    "columnNames" : [ "addresses_id" ],
    "columnValues" : [ "169e2d61-ce39-4bca-8300-185487df7119" ],
    "rows" : {
        "-387062339" : {
            "table" : "User_Address",
            "columnNames" : [ "User_id", "nick" ],
            "columnValues" : [ "f11e01e8-7c2f-4795-81dc-94de7c4ba246", "home" ]
         }
    },
    "table" : "User_Address"
}

//example 2: closer to how entities are stored
{
    "_id" : ObjectId("4f7486c6318ca0fafa7761d0"),
    "table" : "User_Address",
    "columnNames" : [ "addresses_id" ],
    "columnValues" : [ "169e2d61-ce39-4bca-8300-185487df7119" ],
    "rows" : {
        "9d2386c6318ca0fafa32867ae" : {
            "User_id": "f11e01e8-7c2f-4795-81dc-94de7c4ba246",
            "nick": "home"
         }
    }
}

//example 3: considering that MongoDB collections == tables
// in collection "User_Address"
{
    "_id" : ObjectId("4f7486c6318ca0fafa7761d0"),
    "addresses_id": "169e2d61-ce39-4bca-8300-185487df7119",
    "rows" : {
        "9d2386c6318ca0fafa32867ae" : {
            "User_id": "f11e01e8-7c2f-4795-81dc-94de7c4ba246",
            "nick": "home"
         }
    }
}