Using parameters and variables in Workflow Definition Language can be tempting. The examples are chosen quite randomly, but hopefully they will help you when parameterizing your logic apps.
Calling ListCallbackUrl from an ARM template can make you wonder how to retrieve the actual value returned. This post explains how you can make a REST call to Azure to get the value from ListCallBackUrl..
In Workflow Definition Language you might want to escape special characters like space or backslash. Get the hex code and don’t forget to put the %-sign in front.