To make DocuSign work you will need to generate Integration Key and Secret Key, moreover you will need your API Account ID, follow below steps to get it.
Firstly you should go to https://developers.docusign.com/ and login, then go to “My Apps & Keys” (1)
You can see here API Account ID (1) , then click on “ADD APP AND INTEGRATION KEY” (2) button
Type in App name (1) of your choose and click “Create App” (2)
Here you can get Integration Key (1) and after pressing “ADD SECRET KEY” (3) - Secret Key (2)
Next you need to define Redirect URIs (1) with following pattern {jira-host}/secure/DocusignLoginCallback.jspa
After setting all of those press Save (2)
With those values you are ready to set up your DocuSign Jira plugin Jira initial setup