curl --request POST \
  --url https://api.loopreturns.com/api/v1/labels \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "label_request_id": 123,
  "tracking_number": "<string>",
  "carrier": "<string>",
  "label_url": "<string>",
  "rate": {
    "amount": 123,
    "currency_code": "USD"
  },
  "tracking_url": "<string>",
  "qrcode_url": "<string>"
}
'

{
  "id": "<string>",
  "tracking_number": "<string>",
  "tracking_url": "<string>",
  "carrier": "<string>",
  "label_url": "<string>",
  "qrcode_url": "<string>",
  "rate": {
    "amount": 123,
    "currency_code": "USD"
  },
  "status": "<string>",
  "created_at": "2023-11-07T05:31:56Z"
}