Add the JWT Fusion - Encode or JWT Fusion - Decode action to a workflow event (e.g. button click).  Enter your desired option values for your token.  Most options accept dynamic values.
Use the "Results of step x" expression to access returned values including:

JWT Fusion - Encode
- Token (string)
- Custom Payload Values (JSON string)
- Custom Header Values (JSON string)

JWT Fusion - Decode
- Signature (string)
- Options (JSON string)
- Payload (JSON string)
- Header (JSON string)
- Error (string)
- Verified (yes/no)