signedRequest error: {
  "code": 0,
  "msg": "Service unavailable from a restricted location according to 'b. Eligibility' in https://www.binance.com/en/terms. Please contact customer service if you believe you received this message in error."
}
Array
(
    [] => Array
        (
            [bid] => 
            [bids] => 
            [ask] => 
            [asks] => 
        )

    [S] => Array
        (
            [bid] => S
            [bids] => S
            [ask] => S
            [asks] => S
        )

)