web/api/src/test/resources/org/onosproject/rest/post-group.json

{
  "type": "ALL",
  "deviceId": "of:0000000000000001",
  "appCookie": "1",
  "groupId": "1",
  "buckets": [
    {
      "treatment": {
        "instructions": [
          {
            "type": "OUTPUT",
            "port": 2
          }
        ]
      }
    }
  ]
}