curl --request GET \
  --url https://api.ledger.so/v1/transactions/{transactionId} \
  --header 'Api-Key: <api-key>'

{
  "id": "<string>",
  "cardId": "<string>",
  "amount": 123,
  "currency": "<string>",
  "status": "pending",
  "createdAt": 123,
  "agentId": "<string>",
  "userId": "<string>",
  "authorizedAmount": 123,
  "localAmount": 123,
  "localCurrency": "<string>",
  "merchant": {
    "name": "<string>",
    "id": "<string>",
    "category": "<string>",
    "categoryCode": "<string>",
    "city": "<string>",
    "country": "<string>",
    "enrichedName": "<string>",
    "enrichedIcon": "<string>",
    "enrichedCategory": "<string>"
  },
  "declinedReason": "<string>",
  "attestationStatus": "attested",
  "notes": "<string>",
  "tags": [
    "<string>"
  ],
  "category": "<string>",
  "receipt": {
    "hasReceipt": true,
    "mimeType": "<string>",
    "uploadedAt": 123
  },
  "authorizedAt": 123,
  "postedAt": 123,
  "updatedAt": 123
}