Ah, I see. You're trying to configure the plans available through the New Relic tile, but from the command line. The cf cli cannot help you there, but you can use the om cli for interacting with Ops Manager. You can use that to configure products in Ops Manager (and pretty much anything you can do through the UI), which is what you are trying to do here.
https://github.com/pivotal-cf/om
Hope that helps!