Auctions watch

{
  "id": 1,
  "method": "subscribe",
  "params": {
    "channels": [
      "orderbook.ETH-PERP.10.20"
    ]
  }
}

{
  "method": "<string>",
  "params": {}
}

{
  "details": {
    "estimated_bid_price": "<string>",
    "estimated_discount_pnl": "<string>",
    "estimated_mtm": "<string>",
    "estimated_percent_bid": "<string>",
    "last_seen_trade_id": 123,
    "margin_type": "<string>",
    "min_cash_transfer": "<string>",
    "min_price_limit": "<string>",
    "subaccount_balances": "<string>"
  },
  "state": "<string>",
  "subaccount_id": 123,
  "timestamp": 123
}