Is the salary earned from working as a lawyer at Melody Company, which specializes in drafting artists' contracts and operating satellite channels such as "Melody Hits," "Melody Arabia," and "Melody Aflam," unlawful (haram) or lawful (halal)?

Your work in writing contracts with artists is forbidden (haram (definition)) due to the obscene language, lewd acts, and music involved. You must leave it and seek a lawful (halal (definition)) job, for Allah Almighty says: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression." And whoever fears Allah - He will make for him a way out and provide for him from where he does not expect.