curl -v -X POST https://api.nosto.com/exchangerates \
--user :WI0j2oN7TgG42tlblX3yzOQ5xvCYc2oYj9eWg79lghVq8R0nKQXlVE9wvihBUFOw \
-H "Content-Type: application/json" -d '
"price_currency_code":"GBP"
"price_currency_code":"EUR"
"valid_until":"2015-02-27T12:00:00Z"