Parse details from Result

**Is your feature request related to a problem? Please describe.**
Currently details are returned as string which is JWS object that contains header, payload and signature. In order to parse it first base64 decoding needs to be done and then separate those three sections and after that it can be deserialized from json to corresponding object.

**Describe the solution you'd like**
All the parsing should be done in client and Result should contain object that represents JWS.