{"result":[{"short_description":"Can't read email","sys_id":"9c573169c611228700193229fff72400","incident_state":"7","urgency":"1","impact":"1","active":"false"}]}

res = http.send(req);
System.debug(res.getBody());
String jsonText =res.getBody();
Map<String, Object> cObjMap = (Map<String, Object>) JSON.deserializeUntyped(jsonText);
String cObjJson = JSON.serialize(cObjMap.get('Data'));
// Why again :
(Map<String, Object> cObjMapFurious = (Map<String, Object>) JSON.deserializeUntyped(cObjJson);
String cObjJsonDrunk = JSON.serialize(cObjMapFurious);
try
   {
     SObject customObject = (SObject)JSON.deserialize(cObjJsonDrunk, Sobject.class);
     System.debug(' Accomplished: '+customObject);
                }
                catch(Exception ex)
                {
                    System.debug(' @@@@@ Don't visible '+ex.getMessage());
                }