Accessing a url from an email, and sending data to ECC

Hi experts,

I posted this in PI forum but didn't get any response. I a working in PO 7.4, single stack.

ECC system sends emails to users. The end user may check the email from Outlook or even phone. The email contains two urls, both identical except for the third value.

URL one contains, host:port/value1/value2/A

URL two contains host:port/value1/value2/R

A for acceptance and R for reject

The end user clicks on one of those urls, it will call a webservice, updates the values in the webservice and then the values need to be sent to ECC. The webservice has to be created in PI. Value 1 and value 2 keep on changing.

The end user can be out of the PI landscape. How can I achieve this using Process Orchestration?

Regards

Harish