How to integrate signable as an automate button in Zoho CRM

How to integrate signable as an automate button in Zoho CRM

This is what I would like to do. I have an account with signable.co.uk I would like to be able implement some kind of button into crm where I should be able to click that button for mail merge with signable sign box option and when customer signs it the documents then will be saved as pdf in the contacts/accounts attachement and also will be automatically added to Zoho docs. Any suggestions on this please?