As a developer, I want a consistent and easy to use RESTful API following the "principle of least surprise".

The other libpod resources provide an attribute Id. Operations on resources can use these Ids to uniquely identify the resource. Manifests do not expose an Id for operations to use. Instead manifest operations require the client to use the Name under which the given Manifest was resource created. Id should be supported.

The status code of 500 is  returned on bad input, rather than 400.