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"comment_1" : "number_of_digits_after_dot - опциональный параметр,но если у нас будут добавлятся еще валюты кроме EDR BTC, то он понадобится",
"сomment_2" : "формат значения exchangeRate - ##.###### (6 знаков после запятой)",

"currency_list":[
      {
        "currencyName":"EDinar",
        "currencyAbbr":"EDR",
        "number_of_digits_after_dot":2,
        "image"
        {
            "url":"http://47.91.93.63:8081/etaomanager/images/1488166162000_2.png"
            "width":40
            "height":60
        }
        "exchangeRate":0.0028
      },
  
      {
        "currencyName":"Bitcoin",
        "currencyAbbr":"BTC",
        "number_of_digits_after_dot":6,
        "image"
        {
            "url":"http://47.91.93.63:8081/etaomanager/images/1488166162000_2.png"
            "width":40
            "height":60
        }
        "currencyExchangeRate":1
      }
  ]