com.stripe.model.Plan JSON: {
  "id": "gold",
  "object": "plan",
  "amount": 2000,
  "created": 1491863174,
  "currency": "usd",
  "interval": "month",
  "interval_count": 1,
  "livemode": false,
  "metadata": {
  },
  "name": "Gold Special",
  "statement_descriptor": null,
  "trial_period_days": null
}