The zoho sign add-on for zoho crm only allows the sending to sign from the main modules of the system (Leads, Contacts, Accounts, ...)

We need to send for sign from custom modules.

We have managed to create documents to sign with crm data.

Now we need attach (in zoho crm module) resultant pdf file or link to view document in zoho sign.

Please any suggestions, code example, comment or anything that helps us.