I need to implement a giveaway on my website with custom action tracking

I need to implement a giveaway in a Wordpress website (and later in an android/ios app).
I know I can use services like gleam.io but I need some custom action tracking. The difficult part is that I need to track if a user is listening to the radio on my website (for example: 1 hour of listening equals 1 entry per day).

Do you know if there is any online service that lets me keep track of the users and track actions with custom code? I tried emailing most of the services like gleam and kingsumo but I'm not getting affermative answers. If I need to build this by scratch, do you know if there is any example of code (maybe on GitHub) where I can see how a giveaway system is implemented?