Pre filling SignForm field values by URL field alias's in Zoho Sign

Pre filling SignForm field values by URL field alias's in Zoho Sign

Hi, 

Does anyone know if it's possible to pre fill the field values of the SignForm by using field alias's like you can in Zoho forms? 

To be more specific, I want to be able to change the SignForm URL to include some information like this:



That way when a customer lands on the page, the field values are already populated for them based on the custom URL...

So instead of it being like this when they first land on the page:




It's like this:



Any ideas?