Expired timestamp, yours 1539274912, ours 1550390090
<hr />
OAuthRequest Object
(
    [parameters:protected] => Array
        (
            [oauth_consumer_key] => key
            [oauth_nonce] => a2e49e816faaecf044b09af0868e36ce
            [oauth_signature] => rC7/ut6U3W6H3aAbH6QHlV71Xys=
            [oauth_signature_method] => HMAC-SHA1
            [oauth_timestamp] => 1539274912
            [oauth_version] => 1.0
        )

    [http_method:protected] => GET
    [http_url:protected] => http://oauthbin.com:/v1/request-token?oauth_consumer_key=key&oauth_nonce=a2e49e816faaecf044b09af0868e36ce&oauth_signature=rC7%2Fut6U3W6H3aAbH6QHlV71Xys%3D&oauth_signature_method=HMAC-SHA1&oauth_timestamp=1539274912&oauth_version=1.0
    [base_string] => 
)