symbol on `<symbol>@depth<levels>` stream payload

on “partial book depth streams” (<symbol>@depth<levels>) stream payload there is no field indicating the symbol associated with the update. how can i distinguish updates when subscribing to multiple symbols?

here is the documentation example payload:

{
  "lastUpdateId": 160,  // Last update ID
  "bids": [             // Bids to be updated
    [
      "0.0024",         // Price level to be updated
      "10"              // Quantity
    ]
  ],
  "asks": [             // Asks to be updated
    [
      "0.0026",         // Price level to be updated
      "100"             // Quantity
    ]
  ]
}

Use “/stream?streams=<stream name>” instead of “/ws/<stream name>”

Depending on the ws implementation you are using, you may also be able to register a different end point for each currency and thus forward corresponding events to differents consumers. That’s how I do.