Decode JWT token with logstash

Hi Guys, i was wondering if there is any way to decode JWT token with logstash?
i didnt find anything about this.

There are Ruby libraries that encode and decode JWT, so it would be possible to integrate one of them into a ruby filter. Or even define a new jwt filter. I am not aware of anyone having done so.

i found this one..

but cant make it work..

As requested by the OP, see Decode JWT toekn into new filed