Of course that doesn't work. Did you look at the debug "console" of your browser to check for javascript errors? Why not? Did you look at the HTML that was produced/sent? Why not?

After you've done that, you might also want to read the subtread at Re^7: perl dancer route template hashref pass complex json file to server issue (escape/filter).

I'm not going to post code that I think will work for this case yet, as I think it is important for you to think more about this aspect of the problem before being handed code.