Truncate namespaces returned in request path from response body

[the-schwartz]

Given a namespace of /x/y/z with a payload of

 { 
 "a":  {
   "b": [ "c", "d", "e" ]
  }
}

When a request for /x/y is made
Then the response should be

{ 
"z": {
 "a":  {
   "b": [ "c", "d", "e" ]
  }
}
}

Currently it returns the entire document.