How to sign my own PDF document via API

Hi,

I am working currently on very simple integration via Adobe Sign API.

My client wants to have his own PDF files signed with his own signature, as in standard Acrobat Reader fill & sign feature.

I've digged through Adobe Sign API (for which my client has enterprise account) and tried to do things on my own, but I failed on just creating agreement for my own Adobe Sign user account's email.

When I create agreement for someone else everything looks fine, but getting it work for just myself (this is intended) just not.

Maybe I missed something in documentation, as Adobe Sign Fill $ Sign feature works for your own documents.

Any help will be appreciated,

Pawel