curl --request GET \
  --url https://api.ledger.so/v1/virtual-accounts/{virtualAccountId}/balance \
  --header 'Authorization: Bearer <token>'

{
  "ok": true,
  "data": {
    "virtualAccountId": "<string>",
    "balance": "<string>",
    "currency": "<string>",
    "exchangeRate": "<string>"
  }
}