I think the problem you are struggling with is:

you need to provide the metadata of your objects. If you use Steven Sandersons demo, you can use the following line of code:

@(Html.UpshotContext(bufferChanges: true).DataSource<DataServiceController>(x => x.MethodToRetrieveData()))

This will configure the metadata u need and configure upshot for you.

Take a look what it generates, and then you can use it manually if you want to.

greetings

Kristof