You can use this action with the CloudFiles Word Add-in to prepare documents for e-signature using Recipents.
How to Insert a Form Field
- In the Resources Panel, set the action to 'Insert Form Field'.
- Set the Type to 'Signature'
- Under Recipient, select the individual the signature should be assigned to. This list includes all recipients configured under the Recipients resource.
- Click the location in your Word document where the signature should appear.
- Press Insert.
- A placeholder with the word "signature" will appear at the selected location.

These fields are non-editable placeholders in the generated document the actual signing happens in DocuSign. For more details, refer DocuSign Integration for Word-based Document Generation