Hi, I've built a radio streaming app for my radio station. I'm using VosCast streaming services to host my radio station online. The reviewer has asked me to comply with guideline 5.2 so I submitted my VosCast invoice and a copy of my business registration for the radio station. The reviewer then said I still have to provide authorisation to comply with 5.2.1: "However, to be in compliance with guideline 5.2.1, it would still be appropriate to submit documentation demonstrating this authorization." I'm not sure what other document I should submit. Looking for some advise on this. Thanks so much! Here is a screenshot of my app: