I guess you can go to smartscape first, then see what's the underlying service that the web application running on top of, then click on the service to bring you to the service page, then click on dynamic request, after that click the 'throughput' tab and you'll be able to see top request once you scroll down:
If you are using RUM, check the application dashboard for the relevant application. You can see top pages there in the Top User Actions box:
When you hit View full details you can search for specific actions.
If you don't use RUM, you can check the service dashboard as Wai suggested.