Get campaign details

{
  "data": {
    "id": "string",
    "ad_account_id": "string",
    "platform": "meta",
    "platform_campaign_id": "string",
    "name": "string",
    "objective": "string",
    "status": "draft",
    "daily_budget_cents": 0,
    "lifetime_budget_cents": 0,
    "currency": "string",
    "start_date": "2019-08-24T14:15:22Z",
    "end_date": "2019-08-24T14:15:22Z",
    "is_external": true,
    "ad_count": 0,
    "metrics": {
      "impressions": 0,
      "reach": 0,
      "clicks": 0,
      "spend_cents": 0,
      "conversions": 0,
      "ctr": 0,
      "cpc_cents": 0,
      "cpm_cents": 0
    },
    "created_at": "2019-08-24T14:15:22Z",
    "updated_at": "2019-08-24T14:15:22Z"
  }
}

{
  "error": {
    "code": "string",
    "message": "string",
    "details": {
      "property1": null,
      "property2": null
    }
  }
}