facebook - How to add applink to custom story via Object Browser? (hosted object) -

i'm trying post custom story applink. have defined action type complete , object step - user can "complete step" inside app. defined 1 step using object browser. how can add applink via object browser?

there field al:android, assume needs filled data. there hint stating should put there json object or array. did.

tried with:

{"package":"com.example.myapp","class":"com.example.myapp.mainactivity","app_name":"my example app"} 

i've got error:

is there way make work?

you can use facebook mobile hosting api create app link objects. here documentation: https://developers.facebook.com/docs/applinks/hosting-api

should in return this: {"id":"643402985734299"}, id of hosted applink - try it.