I need to have Recieve activity which can receive my custom data. I found examples, but all use coded workflows like such

public class ProcessRequest : Activity
{
    public ProcessRequest()
    {
        Variable<MyData> request = new Variable<MyData> { Name = "request" };

        Receive receiveRequest = new Receive
        {
            ServiceContractName = "IProcessRequest",
            OperationName = "Foo",
            CanCreateInstance = true,
            Content = ReceiveContent.Create(new OutArgument<MyData>(request))
        };
    }
}

The main point is that Recieve.Content property. It is not clear for me how I can do it in XAML designer. What I have to set in the dialog of the Content property - Message or Parameters and what to set inside those options?

Thanks for the light!