ServiceStack: JsonServiceClient usage without IReturn in DTO

ServiceStack: JsonServiceClient usage without IReturn in DTO

What I would like to do is the following:
var client = new JsonServiceClient(ServiceUrl);
var request = new FooQuery {Id = 1};
IEnumerable<Project> response = client.Get(request);
However, my FooQuery doesn't implement any IReturn, and I'd like it not to
(it's in a library without ServiceStack references). Here's my service
side:
Library of business objects:
public class ProjectQuery
{
public int Id { get; set; }
}
AppHost:
Routes.Add<ProjectQuery>("/project", "GET");
Service:
public object Get(Foo request)
{
// do stuff.
}
Is there some nice, clean way to create the JsonServiceClient without
using the IReturn interface on my business object?