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=3823358467
Mods=BarcelonaCiudad_B42
| Workshop item | Subscribers | Declared in |
|---|---|---|
| Barcelona Map B423823358467 | 13 | description footer |