Sending Submit Form to Azure Functions and Returning the Result to a Field

Hi,

As in the title, I'm trying to send XFDF Submit Form data from PDF Forms, process it through Azure functions in C#, and return the result to a field in the same form. Can you point me to a tutorial specifically for this? Or some sample code for the C# side? I've tried several things but it always ends in an error, either on the Azure side not getting the data, or the PDF side returning Invalid Server Response after submitting.

Thank you in advance!