code: def parse(raw_data)
        raw_data['d'].each_with_object(sell: {}, buy: {}) do |obj, result|
          sell_rate = obj['SellRate']
          buy_rate  = obj['BuyRate']
          currency  = obj['CurrencyID'].to_sym
  
          result[:sell][currency] = sell_rate
          result[:buy][currency]  = buy_rate
        end
      end
docs: Parse the #raw_exchange_rates returned in response
   @param [Array] of the raw_data scraped
   @return [Hash] of exchange rates for selling and buying
     {
       { sell: { SYM: rate }, { SYM: rate }, ... },
       { buy:  { SYM: rate }, { SYM: rate }, ... }
     }