With only 65 followers on SoundCloud, Prinston already has an official Avicii remix and an official Cazzette remix. This Maroon 5 remix is not of bootleg quality, despite it saying 'bootleg' as the genre tag. To me, it sounds like they somehow received stems to create this.
With all that being said, I was led to believe this was a new project of someone much bigger. So I did the first thing anyone would do, and I started digging through the Internet.
The SoundCloud page says Stockholm, Sweden, so I looked up "Swedish producers." The next thing I searched was "Prinston music Sweden," and I stumbled upon an interview, in which he states:
"I’ve been around working behind the scenes for quite some time and as a result I’ve had the chance to work with some amazing pop, urban and dance artists. Prinston was about having a personal but also anonymous brand to start with, but as the project develops I may let some more details slip. Right now I just want to let the music do all the talking. Oh, I have a moustache. That seems like a valid point of identification."
So I cross referenced both searches, and looked at all of the producer's information. I don't think Avicii can even grow a mustache, so that rules him out. But my few current guesses are Max Martin, Axwell, Sebastian Ingrosso, and maybe Alesso if he grew a mustache.
I'm not quite sure who it is, but you can follow Prinston on Twitter to find out sooner or later.