Eight Mile Style LLC and Martin Affiliated LLC, music publisher and copyright manager for rap artist Eminem, have filed a lawsuit against Apple in U.S. District Court in Detroit, claiming the company violated copyrights by allowing unauthorized sales of the artist’s works. The lawsuit is a possible sign of things to come as artists fight for a larger share of revenues from digital download sales, reports the Detroit News. “There are a number of unresolved issues,” said Owen Sloane, of Berger Kahn, who has negotiated recording deals for artists such as Elton John, Kenny Rogers and Bonnie Raitt. “You’re going to see more of these suits.” The suit alleges that although Apple pays a portion of the revenues from Eminem downloads to recording label Universal Music Group, Eight Mile Style and Martin Affiliated have never authorized Universal to allow the downloads. Apple has yet to comment on the suit.