curl --request PUT \
  --url https://api.nuwebgroup.com/v1/guestdata \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "guests": [
    {
      "attended": 3,
      "attendedModification": "2021-10-20T09:53:56.499Z",
      "id": 1
    }
  ]
}
'

{
  "success": true
}