curl --request PATCH \
  --url https://api.example.com/v2/fleets/{id}/ \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "is_active": true,
  "regions": "<string>",
  "onboarding_stage": "INITIAL",
  "client": "<string>"
}
'

{
  "id": 123,
  "region_details": [
    {
      "id": 123,
      "title": "<string>"
    }
  ],
  "title": "<string>",
  "is_active": true,
  "billing_type": "PREPAID",
  "onboarding_stage": "INITIAL",
  "warning_threshold_per_vehicle": "<string>",
  "deactivation_threshold_per_vehicle": "<string>",
  "client": "<string>",
  "onboarding_vehicle_order": 123
}