{
  "spot_usdt": {
    "asset": "ETH-USDT",
    "market_type": "spot_usdt",
    "generated_at_ms": 1700000000000,
    "reference_price": 50.096,
    "bucket_size": 0.496,
    "expected_venues": [
      "binance",
      "okx",
      "bybit"
    ],
    "venue_count": 3,
    "coverage": 1,
    "bid_levels": [
      {
        "side": "bid",
        "price_low": 49.6,
        "price_high": 50.096,
        "price_mid": 49.848,
        "depth_quote": 1680.0,
        "venue_count": 3,
        "venue_depth_quote": {
          "binance": 588.0,
          "bybit": 546.0,
          "okx": 546.0
        },
        "hhi": 0.33375,
        "persistence": 0.66,
        "spoof_risk_proxy": 0.05,
        "vacuum_score": 0
      },
      {
        "side": "bid",
        "price_low": 49.104,
        "price_high": 49.6,
        "price_mid": 49.352,
        "depth_quote": 168.0,
        "venue_count": 1,
        "venue_depth_quote": {
          "binance": 168.0
        },
        "hhi": 1,
        "persistence": 0.35,
        "spoof_risk_proxy": 0.7,
        "vacuum_score": 0.9
      }
    ],
    "ask_levels": [
      {
        "side": "ask",
        "price_low": 50.096,
        "price_high": 50.592,
        "price_mid": 50.344,
        "depth_quote": 1638.0,
        "venue_count": 3,
        "venue_depth_quote": {
          "binance": 546.0,
          "bybit": 546.0,
          "okx": 546.0
        },
        "hhi": 0.333333,
        "persistence": 0.64,
        "spoof_risk_proxy": 0.05,
        "vacuum_score": 0.025
      },
      {
        "side": "ask",
        "price_low": 50.592,
        "price_high": 51.088,
        "price_mid": 50.84,
        "depth_quote": 147.0,
        "venue_count": 1,
        "venue_depth_quote": {
          "bybit": 147.0
        },
        "hhi": 1,
        "persistence": 0.35,
        "spoof_risk_proxy": 0.7,
        "vacuum_score": 0.9125
      }
    ],
    "top_bid_wall": {
      "side": "bid",
      "price_low": 49.6,
      "price_high": 50.096,
      "price_mid": 49.848,
      "depth_quote": 1680.0,
      "venue_count": 3,
      "venue_depth_quote": {
        "binance": 588.0,
        "bybit": 546.0,
        "okx": 546.0
      },
      "hhi": 0.33375,
      "persistence": 0.66,
      "spoof_risk_proxy": 0.05,
      "vacuum_score": 0
    },
    "top_ask_wall": {
      "side": "ask",
      "price_low": 50.096,
      "price_high": 50.592,
      "price_mid": 50.344,
      "depth_quote": 1638.0,
      "venue_count": 3,
      "venue_depth_quote": {
        "binance": 546.0,
        "bybit": 546.0,
        "okx": 546.0
      },
      "hhi": 0.333333,
      "persistence": 0.64,
      "spoof_risk_proxy": 0.05,
      "vacuum_score": 0.025
    },
    "bid_depth_total": 1848.0,
    "ask_depth_total": 1785.0,
    "depth_imbalance": 0.017341,
    "status": "COMPOSITE_BOOK_OK",
    "notes": [
      "Illustrative synthetic sample; not live market data.",
      "Synthetic 1h public-depth fixture for dashboard multi-timeframe onboarding."
    ]
  }
}