curl --request PATCH \
  --url https://api.shoppex.io/dev/v1/products/{id}/serials/{serialId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "serial": "KEY-UPDATED"
}
'

{
  "data": {
    "id": "serial_1",
    "serial": "KEY-UPDATED"
  }
}