The /katello/api/v2/systems/ requires system UUID twice as parameter

Issue

• Unable to attach subscription to system using /katello/api/v2/systems/ REST API. It fails with error as below,

# curl -X PUT -u admin:redrhn -H "Content-Type:application/json" -k -d '{"service_level":"Self-Support"}'    --cacert ssl-build/katello-server-ca.crt     https://my.satellite.com/katello/api/v2/systems/ec250dc5-7923-43e9-92f3-cece9b9c44df

Even with correct system UUID mentioned I can see error as below,

{"displayMessage":"Missing values for system.","errors":["key not found: system"]}