In Buying, what would the Payload be like to create a Product asset?

Best regards,

We have been testing the migration of assets in DX4C with the documentation and APIs that were provided to us, but when we want to post or consult a Product entity it generates an error, (attached screenshots)

We would like to know if what is the recommended structure to make a POST of this asset,

We would be very grateful if you could guide us through this process,

Thank you very much in advance!