"fields": {
        "x1": {
            "name": "AnExteremLongName"
        },
        "x2": {
            "name": "AnotherExteremLongName"
        },
    },"row": [
        {
            "x1": {
                "name":"Some random Text"
            },
            "x2": {
                "name":"Other random Text"
            }
        }, ....

String getParamNamebyValue(String ParamValue);