curl --request POST \
  --url https://api.loopreturns.com/api/v1/labels \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "label_request_id": "67329889100573",
  "tracking_number": "9400136105440512280610",
  "carrier": "usps",
  "label_url": "https://s3.amazonaws.com/example-bucket/label.pdf",
  "qrcode_url": "https://s3.amazonaws.com/example-bucket/qrcode.pdf",
  "rate": {
    "amount": 50000,
    "currency_code": "USD"
  }
}'

{
  "id": "67329889100573",
  "tracking_number": "9400136105440512280610",
  "carrier": "usps",
  "label_url": "https://s3.amazonaws.com/example-bucket/label.pdf",
  "qrcode_url": "https://s3.amazonaws.com/example-bucket/qrcode.pdf",
  "rate": {
    "amount": 50000,
    "currency_code": "USD"
  },
  "status": "new",
  "created_at": "2023-04-25T13:25:00-05:00"
}