blockchain.info select value

Challenge: Show data from https://blockchain.info/tobtc?currency=USD&value=500 where USD and value is a parameter
Twig-Code:
{% set js1 = '{"ARS":{"15m":156042831.189999997615814208984375,"last":156042831.189999997615814208984375,"buy":156042831.189999997615814208984375,"sell":156042831.189999997615814208984375,"symbol":"ARS"},"AUD":{"15m":164661.51999999998952262103557586669921875,"last":164661.51999999998952262103557586669921875,"buy":164661.51999999998952262103557586669921875,"sell":164661.51999999998952262103557586669921875,"symbol":"AUD"},"BRL":{"15m":580698.2299999999813735485076904296875,"last":580698.2299999999813735485076904296875,"buy":580698.2299999999813735485076904296875,"sell":580698.2299999999813735485076904296875,"symbol":"BRL"},"CAD":{"15m":150878.1900000000023283064365386962890625,"last":150878.1900000000023283064365386962890625,"buy":150878.1900000000023283064365386962890625,"sell":150878.1900000000023283064365386962890625,"symbol":"CAD"},"CHF":{"15m":86433.610000000000582076609134674072265625,"last":86433.610000000000582076609134674072265625,"buy":86433.610000000000582076609134674072265625,"sell":86433.610000000000582076609134674072265625,"symbol":"CHF"},"CLP":{"15m":101545594.89000000059604644775390625,"last":101545594.89000000059604644775390625,"buy":101545594.89000000059604644775390625,"sell":101545594.89000000059604644775390625,"symbol":"CLP"},"CNY":{"15m":767007.55000000004656612873077392578125,"last":767007.55000000004656612873077392578125,"buy":767007.55000000004656612873077392578125,"sell":767007.55000000004656612873077392578125,"symbol":"CNY"},"CZK":{"15m":2269965.5299999997951090335845947265625,"last":2269965.5299999997951090335845947265625,"buy":2269965.5299999997951090335845947265625,"sell":2269965.5299999997951090335845947265625,"symbol":"CZK"},"DKK":{"15m":695680.209999999962747097015380859375,"last":695680.209999999962747097015380859375,"buy":695680.209999999962747097015380859375,"sell":695680.209999999962747097015380859375,"symbol":"DKK"},"EUR":{"15m":93158.22000000000116415321826934814453125,"last":93158.22000000000116415321826934814453125,"buy":93158.22000000000116415321826934814453125,"sell":93158.22000000000116415321826934814453125,"symbol":"EUR"},"GBP":{"15m":81896.8099999999976716935634613037109375,"last":81896.8099999999976716935634613037109375,"buy":81896.8099999999976716935634613037109375,"sell":81896.8099999999976716935634613037109375,"symbol":"GBP"},"HKD":{"15m":838129.28000000002793967723846435546875,"last":838129.28000000002793967723846435546875,"buy":838129.28000000002793967723846435546875,"sell":838129.28000000002793967723846435546875,"symbol":"HKD"},"HRK":{"15m":497615.7999999999883584678173065185546875,"last":497615.7999999999883584678173065185546875,"buy":497615.7999999999883584678173065185546875,"sell":497615.7999999999883584678173065185546875,"symbol":"HRK"},"HUF":{"15m":36207591.9699999988079071044921875,"last":36207591.9699999988079071044921875,"buy":36207591.9699999988079071044921875,"sell":36207591.9699999988079071044921875,"symbol":"HUF"},"INR":{"15m":9565431.16999999992549419403076171875,"last":9565431.16999999992549419403076171875,"buy":9565431.16999999992549419403076171875,"sell":9565431.16999999992549419403076171875,"symbol":"INR"},"ISK":{"15m":13461309.58000000007450580596923828125,"last":13461309.58000000007450580596923828125,"buy":13461309.58000000007450580596923828125,"sell":13461309.58000000007450580596923828125,"symbol":"ISK"},"JPY":{"15m":16629180.75,"last":16629180.75,"buy":16629180.75,"sell":16629180.75,"symbol":"JPY"},"KRW":{"15m":154407813.9900000095367431640625,"last":154407813.9900000095367431640625,"buy":154407813.9900000095367431640625,"sell":154407813.9900000095367431640625,"symbol":"KRW"},"NGN":{"15m":156229609.3400000035762786865234375,"last":156229609.3400000035762786865234375,"buy":156229609.3400000035762786865234375,"sell":156229609.3400000035762786865234375,"symbol":"NGN"},"NZD":{"15m":187828.27999999999883584678173065185546875,"last":187828.27999999999883584678173065185546875,"buy":187828.27999999999883584678173065185546875,"sell":187828.27999999999883584678173065185546875,"symbol":"NZD"},"PLN":{"15m":395431.78000000002793967723846435546875,"last":395431.78000000002793967723846435546875,"buy":395431.78000000002793967723846435546875,"sell":395431.78000000002793967723846435546875,"symbol":"PLN"},"RON":{"15m":473745.6699999999837018549442291259765625,"last":473745.6699999999837018549442291259765625,"buy":473745.6699999999837018549442291259765625,"sell":473745.6699999999837018549442291259765625,"symbol":"RON"},"RUB":{"15m":8641512.65000000037252902984619140625,"last":8641512.65000000037252902984619140625,"buy":8641512.65000000037252902984619140625,"sell":8641512.65000000037252902984619140625,"symbol":"RUB"},"SEK":{"15m":1017881.959999999962747097015380859375,"last":1017881.959999999962747097015380859375,"buy":1017881.959999999962747097015380859375,"sell":1017881.959999999962747097015380859375,"symbol":"SEK"},"SGD":{"15m":140309.369999999995343387126922607421875,"last":140309.369999999995343387126922607421875,"buy":140309.369999999995343387126922607421875,"sell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%} {% set shcDosc = (js1 | doshortcode) %} {% set shcArr = (shcDosc | json_decode(TRUE) ) %}
Value:

Result: {{nojsonvalue}}
In the above twig-code is “nameoftemplate=blockchaininfogetcurr”, in there is the URL https://blockchain.info/ticker and this twig
{{ _context | json_encode }}

In Action:

Value:

Result: 0.00463296