Metadata for automatic Radio station creation?

Hi Roon team,
I like to develop my own private radio station using node.js. Not for public only for myself.

Working on this I tested the radio station import of Roon with some links:


Using link 1. and 2. Roon did not ask any questions and creates a radio station with logo and description. This is what I like to achieve. Using link 3. I can see no logo and was asked to add more information.

I like to know what kind and syntax of metadata in m3u, m3u8, pls or the stream itself has to be provided that Roon accepts the station without further asking for details.

Help would be appreciated
Thanks DrCWO