curl --request POST \
  --url https://api.example.com/track-shipment \
  --header 'Content-Type: application/json' \
  --data '
{
  "messages": [
    "<unknown>"
  ],
  "id": 123,
  "endpoint": "shipment",
  "user_id": "<string>",
  "custom_title": "<string>",
  "language": "en"
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}