Passing arbiratry data to Docusign Template

[invertium]

I'm trying to fill an "address" field in my docusign template prior to signing. Passing data was already discussed here.

But its not clear whether the support is actually working and how I would go about this. (Added variable to template and tried passing parameter, that didnt work).

 def create_signature(self, signature):
        """Create signature backend-side."""
        params = {'address': 'Home Street'}
        if self.signature_backend.use_callback:
            params['callback_url'] = self.cleaned_data['callback_url']
        self.signature_backend.create_signature(
            signature,
            subject=signature.document_title,
            **params
        )