Programmatically detect if Spotify is playing

[dhess83]

Plan

Premium

Country

USA

Device

Any

Operating System

Any

My Question or Issue

So, I'm a noob.  I would like to run a script on my Windows PC if Spotify (the service, not the Windows app, as the Windows app may not be running) is playing a song.  To put it into psuedo-code,
if SpotifyPlaying = True then ExecuteThisScript.bat
My script changes the output device of my PC to a ghetto whole-house speaker system I made. 

Bonus points (but absolutely not required) if the script can tell WHICH device is playing Spotify.

I found this guide, https://developer.spotify.com/console/get-users-currently-playing-track/ , and I can use it to generate a token to use CURL to output to  a .txt file with my WSL installation.  The text file tells me if something is playing, but I don't know how to connect this to an automation.

Thank you in advance to anyone who can help me!