I am glad that you found a solution and that it works for your scenario.
I want to inform you that this request was declined, because we are developing UI controls, but the Signature is not exactly an UI control.
Posted on:26 Feb 2014 07:54
For other who want this functionality it occurred to me this demo could be amended:
Posted on:19 Nov 2013 15:37
Thank you for your feature request!
The requested control is not part of our planning for the upcoming Q1'14 release, but it is definitely an useful security and authorization control and we will have it in mind in our future plans.