How to get campaign utm source cocos2d js?

Hi. I have a question. How to get campaign utm source cocos2d js (or 2dx) when click link open google play and appstore?
Link ex: https://play.google.com/store/apps/details?id=org.cocos2dx.testgetutm&referrer=utm_source%3D1656464
I need get 1656464 in utm source. Please guide me. Thanks