Shirley Halperin Executive Editor, MusicManager Scooter Braun is sparring with former business associate Peter Comisar over terms of an agreement from 2017 which detailed the formation of SCOPE Capital Management, a private equity fund managed by Comisar and initially bankrolled by Braun.According to a petition for arbitration filed in Los Angeles on June 1 by Braun, the successful investor, content producer and music manager for such artists as Justin Bieber, Ariana Grande and Demi Lovato, who