Retrive only the key object from the json output

I have the following output and I want to extract only the key value of the JSON and those are addNewOrder,navigateReport etc in a table. Details: { [-] addNewOrder: { [+] } login: { [+] } navigateReport: { [+] } navigateOrder: { [+] } openNewOrder: { [+] } openUrl: { [+] } }