{
  "m": 60000,
  "data": {
    "duration": 30.03,
    "slots": [
      {
        "type": "linear",
        "start": 0.0,
        "duration": 30.03,
        "identifiers": [{"scheme": "urn:com:example:ads:id", "value": "example-30s-a"}]
      }
    ]
  }
}