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

{
  "campaign": {
    "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": [
      {}
    ]
  }
}