curl --request DELETE \
  --url https://app2.freyavoice.ai/api/v2/campaign/{campaignId} \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "message": "<string>",
    "result": {
      "success": true,
      "deletedCount": 123
    }
  }
}