<http://apidocs.mailchimp.com/api/2.0/campaigns/list.php>

I would expect that something like

```
{
  "apikey": "12345",
  "filters": {
    "list_id": "abcde",
    "exact": true
  }
}

```

to return a list of total=1 if there is one campaign with list\_id = "abcde", or total=0 if there isn't (using exact=true). However, instead I get the full list. Is this by design? Am I missing some other setting to filter out all mismatches? Is there a way to deal with this?