Please, use NFC to push my order blob up to my private storage device, so that next time I visit I can tap my phone and /send/ the order back in to the system.

Please, use NFC to push my order blob up to my private storage device, so that next time I visit I can tap my phone and /send/ the order back in to the system. So much the better if it's json or xml and editable offline. (Obviously validate either way...)