Can't call Invoke()

I'm trying to call Invoke() but it always throws:

Object does not match target type

I'm not sure what to pass as first parameter - presuming that this is the issue - and I have tried many things with no luck. Below goes my code:

var method = typeof(IBaseRepository<>).MakeGenericType(typeof(Domain.Model.Basic.City))
                 .GetMethod("Get", BindingFlags.Instance | BindingFlags.Public);

var entityData = method.Invoke(??, new[] { (object)id });

The BaseRepository is:

public class BaseRepository<T> : IBaseRepository<T>
{
    public virtual T Get(object id) { }
}

City class is:

public class City : Entity

And Entity is an abstract class:

public abstract class Entity

As first Invoke's parameter I have tried using an instance of City - which should be the right case - and instance of Entity and other things I was sure would not work actually.