Cash Money Records is taking Jay Z’s Tidal streaming service to court.

TMZ reports that the lawsuit stems from Tidal’s streaming of Lil Wayne’s Free Weezy Album. Tidal claims it obtained the rights to stream the music legally from Weezy, in return for part ownership in the company.

Birdman’s lawyers say Jay Z is using Wayne in “a desperate and illegal attempt to save their struggling streaming service.”

Cash Money maintains that it has exclusive rights to all of Lil Wayne’s music, which Tidal’s attorney’s disagree with.

Birdman and company point out that Wayne’s contract states that the “Lollipop” rapper doesn’t have the power to sign the rights over to any of his music. Their lawyers claim FWA got “tepid reviews” that could hurt their ability to market Wayne’s music in the future.

Birdman is seeking $50 million.