{
  "rates": {
    "1999-01-04": {
      "EUR": 0.8482483671,
      "USD": 1.0,
      "GBP": 0.6031894139
    }
  },
  "start_at": "1999-01-01",
  "base": "USD",
  "end_at": "1999-01-04"
}