{
  "id": "test-request",
  "imp": [{
    "id": "1",
    "banner": {
      "format": [{ "w": 300, "h": 250 }]
    },
    "ext": {
      "djax": {
        "publisherId": "pub-12345"
      }
    }
  }],
  "site": {
    "page": "https://example.com"
  },
  "device": {
    "ua": "Mozilla/5.0",
    "ip": "192.168.1.1"
  },
  "tmax": 500,
  "cur": ["USD"]
}