Help me out here HN... I remember somewhere seeing an API format where you passed up the empty JSON object which you wanted filled and returned. Something lik

Help me out here HN... I remember somewhere seeing an API format where you passed up the empty JSON object which you wanted filled and returned. Something like: (request) {username:"",address:"",credits:""} (response) {username:"Manilow, Barry", address:"Hollywood Bowl", credits: 99} Clearly not optimal, but it worked pretty well and was very intuitive.