All requests must also include a special nonce POST parameter with increment integer. (>0)"
Haven't used that API but I suspect what they want you to do is to modify that nonce they sent you in some sort and return it to them (hint: add 1 to it maybe?)
ah, that would make sense. I didn't even understand that much. Thanks for your assistance.
I still need help on the whole thing and how to go about that in php, if anyone can be of help.