I've a use-case to integrate e-signature with an existing application of some confidential customer.
Use-Case: Tom is a human resources manager. Tom wants his customer Pedro to sign a document.
Tom would create an envelope. Pedro should have the link i.e. "signing URL" where he can sign that document.
Now, who would hit POST API to create that "signing URL" ? Is it Tom ? If yes, then does he need to share that link with Pedro and how?