{
  "plays": [
    { "id": "hamlet", "play": { "name": "Hamlet", "type": "tragedy" } },
    { "id": "as-like", "play": { "name": "As You Like It", "type": "comedy" } },
    { "id": "othello", "play": { "name": "Othello", "type": "tragedy" } }
    ],
  "invoice": {
    "customer": "BigCo",
    "performances": [
      {"playId": "hamlet", "audience": 55 },
      {"playId": "as-like", "audience": 35 },
      {"playId": "othello", "audience": 40 }
    ]
  }
}