Request application consent generating JWT payload encrypted

Hello, i’m following the steps in this doc https://developers.docusign.com/platform/auth/jwt/jwt-get-token/.

and when i paste the jwt on jwt.io the payload come in this format: 

"\u0001\u000b\u0000\u0000\u0000\u0001\u0000\u0006\u0000\u0007\u0000\u0000my�SL�H\b\u0000\u0000���SL�H\u0002\u0000M�%��O�B�'\u0015[�0É\u0015\u0000\u0001\u0000\u0000\u0000\u0018\u0000\u0003\u0000\u0000\u0000\u0005\u0000\u0000\u0000\u001d\u0000\u0000\u00002\u0000\u0000\u0000\r\u0000$\u0000\u0000\u00001dff3d9d-d24b-48b0-bd7b-96d282b4d7af\"\u0000$\u0000\u0000\u00001dff3d9d-d24b-48b0-bd7b-96d282b4d7af0\u0000\u0000my�SL�H\u0012\u0000\u0001\u0000\u0000\u0000\u000b\u0000\u0000\u0000interactive7\u0000}\u0012����5N����3t\u0016�"

Even after verifying the signature with public and private key.. 

and if I try to use the JWT on https://account-d.docusign.com/oauth/token I still get:

{

"error": "invalid_grant",

"error_description": "user_not_found"

}