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=3821650939
Mods=SA2OST
| Workshop item | Subscribers | Declared in |
|---|---|---|
| Sonic Adventure 2 Soundtrack(B42)3821650939 | 22 | description footer |