Imports System
Imports System.IO
Imports System.Collections
Imports System.Collections.Generic
Imports System.Runtime.Serialization
Imports ServiceStack
Imports ServiceStack.DataAnnotations
Imports Test.ServiceInterface
Namespace Global
    Namespace Test.ServiceInterface
        Public Partial Class SendReturnVoid
            Public Overridable Property Id As Integer
        End Class
    End Namespace
End Namespace
To override the Content-type in your clients, use the HTTP Accept Header, append the .jsv suffix or ?format=jsv
The following are sample HTTP requests and responses. The placeholders shown need to be replaced with actual values.
POST /jsv/oneway/SendReturnVoid HTTP/1.1 
Host: test.servicestack.net 
Accept: text/jsv
Content-Type: text/jsv
Content-Length: length
{
	id: 0
}