Passing arguments to app on DIAL launch

How can I pass arguments to my application when I launch it with a DIAL Post command?

I am building a mobile application that launches the TV application by making a Post call on this url http://Tv-IP-Address:8001/api/v2/applications/AppId

I would like to know how I can pass some arguments along to the application on launch. And how I can retrieve those arguments from within the TV application when it loads. The Tv application is a web application and I am looking to do this in the main javascript file.

Currently I have tried posting some JSON in the request body of my POST command to the TV and inspecting the appControl object from the getRequestedAppControl() function but I do not see any of my parameters in there.

Any help I can get in this regard would be very highly appreciated.