Off the back of

“Navalny, from being an anti-corruption investigator/blogger, managed to create the biggest opposition organisation that was independent from the Kremlin. And he managed to do this by recruiting and training a lot of people. He was innovative in crowdfunding and he made a very important move from blogging to YouTube which made his anti-corruption content more and more readily available and in an entertaining form. It’s a political party created off the back of a media organisation.”

Anne Applebaum.

What is the exact meaning of the "created off the back of a media organisation"?