Retrieve a single campaign by its numeric id.

When to use. Drill-down to the full detail of one campaign, for example from a list row, or read its current settings before an update. Returns 404 if the id does not exist or is not visible to your API user.

Shape. { "campaigns": [ <campaign> ], "total_campaigns": 1 }, matching the list endpoint's envelope.

{
  "campaigns": [
    {
      "description": "Dialer Campaign",
      "id": 51,
      "name": "Dialer Campaign"
    }
  ]
}