If I was trying to recreate that, I'd use the "Spiky Analog" patch in the "Fast Synth" section, try adding some more distortion, maybe create a combi, with multiple instances, and play with lowering one patch an octave, maybe try some effects like flange, or phase, and see what you get.
At any rate, you should have some fun, and who knows, maybe you'll find something else you really like.
Btw, I have an M3, but I'm assuming your M-50 has that patch also.
Good luck.
