How can I recover my deleted Apple Music playlist?

"Most of playlist randomly deleted: Hello, today I added a song to a playlist that isn't on apple music. I dragged the mp3 file on the playlist and for some reason it deleted most of the playlist. I did not manage to put my phone on airplane mode fast enough to avoid sync. It's about 9 hours of music that was deleted, so I dont think I will be able to find it all again. I did not have it downloaded or added to my library. Is there any way to restore the playlist?[...]"

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Recovering Lost Music:

Was this synced with iCloud, or stored on another device (i.e. a Mac)? If so, search the Mac. If you think it is a backup, then you might need to restore your Mac from a Time Machine Backup that you created that contains this file. Back up your Mac prior to this restoration, and then restore back to it, after the troubleshooting is complete.

Using Spotlight Search to Find it:

1. Hold Down: the command key
2. Press: the spacebar
3. Type: [the name of the file] or "mp3 files"

i.e. Screenshot

Your cloud music library cannot contain ineligible content, such as tracks that have a cloud status of error, duplicate, ineligible, etc. There should be a warning when you do this that will allow you to cancel the operation. If you add such a track to a playlist on your computer then the list should remain on the computer, but get removed from the cloud library. If you remove the problem track then you should be able to right-click on the playlist and select Add to Library to add it back to the cloud library, after which it can sync back to your device.

tt2

"The playlist was never downloaded to my mac and I don't have any backups that contain it. Why would I, if I'm paying for a service that is supposed to save my music for me. My icloud is full. Also, I'm not looking for the specific audio file, I'm looking for the playlist."

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Playlists Gone Missing:

I misread your post, think you were looking for MP3 files you had in your playlist. But, as for a playlist, is an XML file format --but not always.

You are welcome.