Fail with DocuSign Integration

Hi, we have been with an error for a while and we need some help to solve it. We are trying to generate the senders token for a Docusign Integration, but it gives us an success response (code 200), but in the response, we dont get the token. We are using the data used in the attached image

In the emailAddresss Rule input we are using the same email of the developer account of docusign, and in the accessToken rule input, we pass an admin access token that we obtain in another integration. 

If there is an easier way to implement this integration with docugin i would apreciate it if you can tell it. 

Thank you!