I do not believe that to be the case. I imagine he has recieved material and financial support from some Russians like Khodorkovsky and his sympathizers, but he's an advocate for free speech and rights for Russian people above all else. He is fighting the most entrenched and corrupt oligarchy in the world, and he is now paying the price for his fight.
Free Navalny!
Russian opposition leader Alexei Navalny was thrown into prison over trumped up charges and his supporters have been arrested in droves for daring to peacefully protest. Putin is now hitting back at Europe over proposed new sanctions designed to punish Russia over its totalitarian policies.
The specific content of any such call would be labeled classified and outside of a FOIA for who knows how long, but we do get readouts of the calls that are high level topic overviews. Thankfully, we're getting those outlines again. The last administration stopped giving them out.
Things are dire for democracy in Russia. Being the reason a protest happens is enough to have your family members jailed now.
This is a straight dictator move more in line with what you'd expect from Mao or Stalin and not the leader of a modern democracy.
Edit: "Democracy"