MPE Use Cases roles

[kenricnelson]

As I read the use case of Kevin (buyer) and Jack (seller) on the MPE page (https://dev.singularitynet.io/docs/ai-developers/mpe/) it appears that these two roles get inverted in the actual description of the case. Perhaps I'm misreading the case but this would be worth double-checking.

For instance in the sentence "Kevin needs to authorize using the signature (using his private key to sign) to let Kevin withdraw" shouldn't this read "to let Jack withdraw". This is just an example; I think there are other issues like this in the description.