For an na_dl document type, a cropped image is now returned in the front property of the images object. The images object is returned when the /start request includes a return_images flag set to true. This cropping significantly reduces the size of the base64 data.
We added a C#/.NET recipe for the /start endpoint. It demonstrates how to start a transaction with a signed payload using C#/.NET framework. The recipe includes details on how to set up the request, encode and sign the payload, post the request, verify the signature, and decode the payload.