[
        "users":
                [
                        [
                                "user": [
                                        "name": "Mariano",
                                        "lastName": "Achaval",
                                        "contacts": []
                                ]
                        ],
                        [ "user": [
                                "name": "Emiliano",
                                "lastName": "Lesende",
                                "contacts": [
                                        [
                                                "contact": [
                                                        "name": "Uri S."
                                                ]
                                        ],
                                        [
                                                "contact": [
                                                        "name": "Dan D."
                                                ]
                                        ]
                                ]
                        ]
                        ],
                        ["user": [
                                "name": "Luis",
                                "lastName": null
                        ] ]
                ],
        "addresses": [ [ "street": "Cordoba 1234" ], [ "street": "Corrientes 248" ]],
        "phones": [1234, "123", true]
]