Pass unsigned jwt token to temporal claimmapper

Hi team, we are using temporal binaries. The jwt token provider in our company uses a different struct for passing roles and permissions than temporal. We would like to use defaultAuthorizer feature of temporal.
To pass the jwt token in the format which temporal expects , we would need to read the jwt token in one of our proxy layer and modify it.
Is it possible to pass the unsigned token to temporal claimmapper or bypass the validations it do with jwt token?