Sure you could. The funny thing is, I've had this product on the market using this very concept of JIT signing, using the browser (and apps) to do all the work, didn't really put any effort into, only used for my clients as a CMS-as-a-service or CMSSAAS WTF? called kitgui.com, been on some department store brands using it for ecommece sites that i've put as a consequence of needing this on multiple backend platforms. Any hoo, never goes down, never had to do jack shit scaling or worry about it but I've completely neglected it so it looks like 2010 crap themes and diy web standards. Anybody want to partner up on it and make a bad-ass json cms that spreads to all devices? I'll gladly divvy % on current revenue.