{
    "sendMeEmails": 1,
    "users" : [
        {}, {}, {},
        {
            "address": {
                "city": "Kyiv",
                "street": "Smolna"  
            }
        }
    ],
    "zipCode": "01246",

    "required_if_1": "",
    "required_if_2": "",
    "required_if_3": "",

    "extra_field": "aaaa"
}