如何在facebook上获取leadgen webhook的formId？

Question

我已经在我的脸书页面上创建了用于跟踪潜在客户的webhook。 我需要formId的铅，但我的日志显示如下。

[field] => leadgen
      [value] => stdClass Object
            (
              [ad_id] => 0
              [form_id] => 2.6147643765585E+14
              [leadgen_id] => 2.6356365078047E+14
              [created_time] => 1491489109
              [page_id] => 4.3192338381483E+14
              [adgroup_id] => 0
            )

[form_id]显示为2.6147643765585E + 14，但实际的formId不同。我认为它是编码形式的吗？

如何以解码形式获取formId，我的意思是原始形式像

 "field" => "leadgen",
      "value" => array(
        "leadgen_id" => 123123123123,
        "page_id" => 123123123,
        "form_id" => 12312312312,
        "adgroup_id" => 12312312312,
        "ad_id" => 12312312312,
        "created_time" => 1440120384
      )

提前致谢..