Fb example:
FBInstant
.getLeaderboardAsync('my_awesome_leaderboard.' + context.getID())
.then(leaderboard => {
console.log(leaderboard.getName());
return leaderboard.setScoreAsync(42, '{race: "elf", level: 3}');
})
.then(() => console.log('Score saved'))
.catch(error => console.error(error));
Set score action has no input for extra data: