Will the national karaoke backstage change its signature?
No, your national karaoke should only be logged in by yourself, unless someone logs in to your account to change your personal signature. If it is a personalized signature, you can sign it in your profile. If it is a signature on each song, you need to sign it before each song is released, that is, write down what you want to say. Both methods can be signed, and you can choose either one to try.