{
    "timestamp": "2025-04-29T14:03:00Z",
    "target": "https://api.example.com/health",
    "status": "down",
    "http_status_code": null,
    "latency_ms": null,
    "error_message": "ENOTFOUND",
    "observer": {
      "address": "0xABCD1234EF567890ABCD1234EF567890ABCD1234",
      "country": "France",
      "region": "Île-de-France",
      "city": "Paris",
      "probe_version": "0.1"
    },
    "proof": {
      "hash": "0xa9b10e75c7d2ddde301c3eb3467c3f9f1db0219f2a7a9f1d6f2c6efc8c7a1b2e",
      "signature": "0x30450221009ae2cd..."
    },
    "version": "0.1"
  }