array:8 [
  "connection" => array:1 [
    0 => "close"
  ]
  "cache-control" => array:1 [
    0 => "max-age=259200"
  ]
  "x-forwarded-for" => array:1 [
    0 => "10.1.18.184, 216.73.216.58"
  ]
  "via" => array:1 [
    0 => "1.1 squid-proxy-5b5d847c96-tdql4 (squid/6.13)"
  ]
  "host" => array:1 [
    0 => "web.isignplus.com"
  ]
  "accept-encoding" => array:1 [
    0 => "gzip, br, zstd, deflate"
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  "user-agent" => array:1 [
    0 => "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
  ]
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    0 => "*/*"
  ]
]
dịch vụ isign plus
