gistfile1.txt

{
    "getFreeUnitsResponse": {
        "FreeUnit":  
        {
            "FreeUnits": [ 
              {
                "freeUnitType": "FreeSmsMms",
                "totalAmount": 20,
                "usedAmount": 0,
                "leftAmount": 20
             }
            ]
        }
    }
}