I tried with the new JSON and got Error/Nothing was returned.
I'm running Catalina and installed python3 via homebrew.
My launch path for python3 is /usr/local/bin (determined via running which python3) and my site packages path is /usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages which I entered in the second params line. (I followed the directions here: https://stackoverflow.com/questions/122327/how-do-i-find-the-location-of-my-python-site-packages-directory)
I'm trying with Apple Music. I open Music, start a song then use Run Script Now in the BTT config pane.
Any suggestions on different approaches I can try? Happy to add any debug lines into the python script to help resolve