{
  "account_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "total_return": "example-string",
  "total_return_percentage": "example-string",
  "period_start": "1990-01-15",
  "period_end": "1990-01-15",
  "currency": "EUR"
}