биндинги исправлены (вроде как)

Course/Contracts/BindingModels/MachineBindingModel.cs

@@ -10,7 +10,9 @@ namespace Contracts.BindingModels
     public class MachineBindingModel : IMachineModel
     {
         public int Id { get; set; }
+        public int UserId { get; set; }
         public string Title { get; set; }
         public string Country { get; set; }
+        public Dictionary<int, (IWorkerModel, int)> MachineWorker { get; set; } = new();
     }
 }

Course/Contracts/BindingModels/WorkshopBindingModel.cs

@@ -13,5 +13,6 @@ namespace Contracts.BindingModels
         public string Title { get; set; }
         public string Address { get; set; }
         public string Director { get; set; }
+        public Dictionary<int, (IWorkerModel, int)> WorkshopWorker { get; set; } = new();
     }
 }