curl --request GET \
  --url https://backstage.example.com/api/soundcheck/campaigns

{
  "campaigns": [
    {
      "id": "<string>",
      "type": "campaign",
      "levels": [
        {
          "ordinal": 123,
          "checks": [
            {
              "id": "<string>",
              "name": "<string>",
              "description": "<string>",
              "filter": {},
              "exclude": {}
            }
          ],
          "name": "<string>",
          "description": "<string>",
          "badge": {
            "color": "<string>",
            "svg": "<string>"
          }
        }
      ],
      "name": "<string>",
      "description": "<string>",
      "ownerEntityRef": "<string>",
      "group": "<string>",
      "badge": {
        "color": "<string>",
        "svg": "<string>"
      },
      "filter": {},
      "exclude": {},
      "documentationURL": "<string>",
      "draft": true,
      "isEditable": true,
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "archived": true,
      "supportChannel": "<string>",
      "startDate": "<string>",
      "targetCompletionDate": "<string>",
      "milestones": [
        {}
      ]
    }
  ]
}