HTTP/1.1 400 None
Content-Length: 120
Content-Type: application/json; charset=UTF-8
Date: Tue, 29 Nov 2011 00:33:48 GMT

{
    "badRequest": {
        "code": 400,
        "message": "Volume 'size' needs to be a positive integer value, -1.0 cannot be accepted."
    }
}