Retrieve only the key object from the json output

Question

I have the following JSON output and I want to select the key elements from this JSON, which are addNewOrder,login,navigateReport,navigateOrder,openNewOrder,openUrl in table

Details: {
         addNewOrder: {
            dur: 7706ms
            end: Wed Sep 18 2019 14:38:48 GMT+0530 (India Standard Time)
            navigationAPIData: {
              connectEnd: 1568797694032
              connectStart: 1568797694032
            }
             start: Wed Sep 18 2019 14:38:40 GMT+0530 (India Standard Time)
          }
         login: {
            dur: 7046ms
            end: Wed Sep 18 2019 14:38:17 GMT+0530 (India Standard Time)
            navigationAPIData: { 
            connectEnd: 1568797694032
              connectStart: 1568797694032
              domComplete: 1568797694775
            }
            }
         navigateReport: { 
            dur: 2804ms
            end: Wed Sep 18 2019 14:38:28 GMT+0530 (India Standard Time)
          }   
         navigateOrder: {
            dur: 1804ms
            end: Wed Sep 18 2019 14:38:23 GMT+0530 (India Standard Time)
            }
         openNewOrder: { 
            dur: 1700ms
            end: Wed Sep 18 2019 14:38:33 GMT+0530 (India Standard Time)
            }
         openUrl: {
            dur: 3011ms
            end: Wed Sep 18 2019 14:38:00 GMT+0530 (India Standard Time)
            }
         }

tried with regex but not working.