.NET Core / Web Job Listener / RemoteExecutionContext

Hello, i am working through to see if it is possible to create .NET core Web Job, that is a Queue listener without the SDK (Microsoft.Xrm.Sdk).

The RemoteExecutionContext is hanging me up.  is it possible to interact with the Message (Body) another way that isn't reliant upon the SDK.  the actions i need to do in the listener i can accomplish with the web Api, however getting the context is the hang up.

If someone could advise if there is any solution to this as of yet.  thanks