curl --request GET \
  --url https://api.flexforwardship.com/tracking/{id} \
  --header 'Authorization: Bearer <token>'

{
  "id": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
  "trackingNumber": "YT2503010001CN",
  "tag": "InTransit",
  "subtag": "InTransit_001",
  "subtagMessage": "In transit",
  "slug": "yunexpress",
  "checkpoints": [
    {
      "checkpointTime": "2025-03-02T10:30:00.000Z",
      "city": "Shenzhen",
      "state": "Guangdong",
      "countryRegion": "CN",
      "location": "<string>",
      "message": "Shipment departed from sorting center",
      "tag": "InTransit",
      "subtag": "InTransit_001",
      "subtagMessage": "In transit",
      "slug": "yunexpress"
    }
  ]
}