curl --request PATCH \
  --url https://api.voxo.co/v2/admin/call-campaigns/add-numbers/{campaignId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "numbers": [
    {
      "number": "<string>",
      "description": "<string>"
    }
  ]
}
'

{
  "status": "<string>",
  "message": "<string>",
  "campaignId": 123,
  "campaign": "<string>",
  "numbers": [
    {
      "number": "<string>",
      "description": "<string>"
    }
  ]
}