{
  "types": [
    "Subscription"
  ],
  "Subscription": {
    "elements": {
      "Subscription.channel.payload": {
        "old-min": 1,
        "new-min": 0
      },
      "Subscription.channel.header": {
        "old-max": "1",
        "new-max": "*"
      }
    },
    "status": "changed"
  }
}