PATCHing arrays

Hello,

First up, thanks so much for making the beta API available, i've been wanting for this for ages!

The docs state:

.. for array endpoints "Each child supports the PATCH and DELETE method (you should use the first key as id).

I'm trying to modify the active status of a service under parentalControls, if I issue a GET against

/profiles/:profile/parentalControl/services

I get an array of objects of the form: 

{"id":"youtube","website":"https://www.youtube.com","active":true}

Based on the docs I should be able to issue a PATCH against:

/profiles/:profile/parentalControl/services/youtube

Ideally with a body of:

{"active": false}

Unfortunately this doesn't appear to work and returns a 400 with the error:

{
  "errors": [
    {
      "code": "type",
      "source": {
        "pointer": ""
      },
      "detail": "`` must be object."
    }
  ]
}

I also tried a PATCH against

/profiles/:profile/parentalControl/services

with a body containing the full array item but that returns a 404.

Any suggestions on how we should access array endpoints? An example in the docs would also be great.

Thanks

Marcus