I think this might the music publisher's role. The main focus of the role is to administer,exploit, and collect royalties for its copyright properties. Administer entails the filling of a notice of copyright in the U.S. Copyright in Washington, the issuing of licenses, collecting of royalties, and paying writers and co-publishers their share of the proceeds. Exploitation involves getting artists to record your copyrights, and extends to getting them used in films,television,radio, and TV commercials, etc.
Jazz composition is when notes are written down for each instrument, but jazz improvisation is when musicians play what comes to mind in a certain key.