Segment tracking for Google Anlytics Events
// demo de segment
analytics.track('Logged In', {
  category: 'Account',
  label: 'Premium',
  value: 50
});
// overview de otra aplicación de ejemplo
analytics.track('Clicked on Gold button', {
  category: 'Click',
  label: 'Gold button'
});
analytics.track('Bought Gold subscription', {
  category: 'Subscription',
  label: 'Gold subscription',
  value: 100
});