I have very little experience with DocuSign. It might be possible to do this using a tracking gif. It may be possible to embed it in your envelope.
A GIF request is sent to the Analytics servers in the following cases
and classified according to the table below. In each of these cases,
the GIF request is identified by type in the utmt parameter. In
addition, the type of the request also determines which data is sent
to the Analytics servers. For example, transaction and item data is
only sent to the Analytics servers when a purchase is made. User,
page, and system information is only sent when an event is recorded or
when a page loads, and the user-defined value is only sent when the
_setVar method is called.
Example:
http://www.google-analytics.com/__utm.gif?utmwv=4&utmn=769876874&utmhn=example.com&utmcs=ISO-8859-1&utmsr=1280x1024&utmsc=32-bit&utmul=en-us&utmje=1&utmfl=9.0%20%20r115&utmcn=1&utmdt=GATC012%20setting%20variables&utmhid=2059107202&utmr=0&utmp=/auto/GATC012.html?utm_source=www.gatc012.org&utm_campaign=campaign+gatc012&utm_term=keywords+gatc012&utm_content=content+gatc012&utm_medium=medium+gatc012&utmac=UA-30138-1&utmcc=__utma%3D97315849.1774621898.1207701397.1207701397.1207701397.1%3B...