PUT /documents/{id}
To send the document for signatures you must make a PUT call to documents/{id}. In this call all created tags should be sent along with the document so that they are merged and attached along with the document for signatures. In addition to these tag objects, a signing status object must be included.

If a tag object already includes an id, the existing tag with that id will be updated if one exists. To create and update a new tag onto the document, append another tag object without an id. Once this reaches the server, a tag will be automatically created and given an id as seen in the response below. The response you’ll get back from this will be the full document object along with all its invitations, files, tags and histories as seen below: