Update tracking number

curl --request PATCH \
  --url https://api.auctionnow.io/api/alpha/merchant/orders/{id}/trackingNumber \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "data": {
    "trackingNumber": "<string>"
  }
}
'

{
  "data": {},
  "timestamp": 123,
  "message": "<string>"
}