Important Attributes	Description
`email`	The email address of the customer whose VIP status changed.
`customer`	The customer whose VIP status changed.
`vip_stats`	Object reflecting the customer's accumulations towards earning a tier: Points Earned Amount Spent (in cents) - This refers to the annual amount spent by the customer (a rolling year or calendar year, according to your settings) How many purchases the customer made How many referrals were completed
`vip_stats_needed_maintain`	Object conveying how much is needed for the customer to maintain their current tier.
`vip_stats_needed_next`	Object conveying how much is needed for the customer to obtain the next tier.

{
   "topic":"swell/tier/status/changed",
   "name":"Swell Tier Status Changed",
   "email":"john.smith@gmail.com",
   "customer":{
      "total_spend_cents":0,
      "total_purchases":0,
      "perks_redeemed":2,
      "last_purchase_at":null,
      "email":"john.smith@gmail.com",
      "referred_by": "jane.smith@gmail.com",
      "points_earned":375,
      "points_balance":375,
      "points_expire_at":null,
      "first_name":null,
      "last_name":null,
      "last_seen_at":"2016-10-15T18:14:56.000Z",
      "third_party_id":"4302977345",
      "vip_tier_name":"SILVER",
      "vip_tier_ends_at":"2017-10-31",
      "referral_code":{
         "code":"x09u052",
         "shares":0,
         "facebook_shares":0,
         "twitter_shares":0,
         "email_shares":0,
         "emails_sent":0,
         "emails_viewed":0,
         "links_clicked_from_email":0,
         "links_clicked_from_twitter":0,
         "links_clicked_from_facebook":0,
         "orders":1,
         "amount_cents":3000,
         "average_amount_cents":3000,
         "expires_at":null,
         "expired":false,
         "completed_referral_customers":[
            {
               "email":"hillary@gmail.com",
               "first_name":"Hillary",
               "last_name":"Swanson",
               "referral_points_contributed":0,
               "last_seen_at":"2016-10-15T16:38:20.000Z"
            }
         ],
         "email":"john.smith@gmail.com",
         "unique_clicks":1,
         "total_clicks":1
      }
   },
   "vip_stats":{
      "pointsEarned":0,
      "amountSpentCents":500,
      "purchasesMade":0,
      "referralsCompleted":0
   },
   "vip_stats_needed_maintain":{
      "points_needed":0,
      "amount_cents_needed":0,
      "purchases_needed":0,
      "referrals_needed":0
   },
   "vip_stats_needed_next":{
      "points_needed":0,
      "amount_cents_needed":0,
      "purchases_needed":0,
      "referrals_needed":0
   }
}