Found a faster way:
when you go to the website https://www.radio-browser.info and search for your favorit station, you click on the version you want to use and then the ID is in the URL
https://www.radio-browser.info/history/9612651b-0601-11e8-ae97-52543be04c81
9612651b-0601-11e8-ae97-52543be04c81