{
    "ResponseMetadata": {
        "RequestId": "aa23ad55-9167-11e2-b691-fdba749921d2"
    }, 
    "DBParameterGroups": [
        {
            "DBParameterGroupName": "default.mysql5.5", 
            "DBParameterGroupFamily": "mysql5.5", 
            "Description": "Default parameter group for mysql5.5"
        }
    ]
}