Common Task API

Using C# and the RESTClient, is there a way to get the common tasks from the system? I see that common tasks are PMTask DAC objects without a project reference.

I have a generic method to get objects from Acumatica:

 public ServiceResult<T> GetList<T>(string filter = "") where T : class, ITopLevelEntity, new()
 {
     return ExecuteWithClient(client =>
     {
         var results = client.GetList<T>(null, null, filter);
         return new ServiceResult<T>
         {
             Success = true,
             Results = results.ToList()
         };
     });
 }

Is there a way to pass a filter which would return the Common Tasks from screen PM2083PL?

Any suggestions would be greatly appreciated.

Mike