curl --request POST \
  --url https://api2.rhombussystems.com/api/partner/getListOfAvailableHardware \
  --header 'Content-Type: application/json' \
  --header 'x-auth-apikey: <api-key>' \
  --header 'x-auth-scheme: <x-auth-scheme>' \
  --data '{}'

{
  "controlledHardwareList": [
    {
      "macAddress": "00:11:22:33:44:55",
      "serialNumber": "RH123456789"
    }
  ]
}