Add it to your server
In your server's .ini file (servertest.ini by default), add these to the existing WorkshopItems= and Mods= lines, separated by a semicolon (;).
WorkshopItems=3823495897
Mods=GreatestClassicsV2
| Workshop item | Subscribers | Declared in |
|---|---|---|
| New Music - Greatest Classics 2.0!3823495897 | 79 | description footer |