[
  /** Metadata change **/
  {
    "time": 1456956659469,
    "entityId": {
      "namespace": "ns1",
      "dataset": "ds1",
      "entity": "DATASET"
    },
    "user": "cdap",
    "type": "METADATA_CHANGE",
    "change": {
      "additions": [
        {
          "scope": "USER",
          "properties": {
            "key1": "value1"
          },
          "tags": [
            "tag1"
          ]
        }
      ],
      "deletions": [
        {
          "scope": "SYSTEM",
          "properties": {},
          "tags": [
            "tag2"
          ]
        }
      ]
    }
  },
  
  /** Dataset admin operation **/ 
  {
    "time": 1456956659470,
    "entityId": {
      "namespace": "ns1",
      "dataset": "ds1",
      "entity": "DATASET"
    },
    "user": "cdap",
    "type": "CREATE"
  },
  
  /** Dataset access **/
  {
    "time": 1456956659471,
    "entityId": {
      "namespace": "ns1",
      "dataset": "ds1",
      "entity": "DATASET"
    },
    "user": "cdap",
    "type": "ACCESS",
    "access": {
      "type": "READ",
      "entityId": {
        "namespace": "ns1",
        "application": "app1",
        "type": "Flow",
        "program": "flow1",
        "entity": "PROGRAM"
      }
    }
  }
]