{
 "action": "subscribe-public",
 "module": "trading",
 "path": "orderbook/{market_code}"
}

{
  "action": "push",
  "topic": "trading/orderbook/btc-pln",
  "message": {
    "changes": [
      {
        "marketCode": "BTC-PLN",
        "entryType": "Buy",
        "rate": "27601.35",
        "action": "update",
        "state": {
          "ra": "27601.35",
          "ca": "0.46205049",
          "sa": "0.46205049",
          "pa": "0.46205049",
          "co": 4
        }
      }
    ],
    "timestamp": "1576847016253"
  },
  "timestamp": "1576847016253",
  "seqNo": 40018807
}

{
	"requestId": "78539fe0-e9b0-4e4e-8c86-70b36aa93d4f",
	"action": "proxy",
	"module": "trading",
	"path": "orderbook/{market_code}"
}

{
  "action": "proxy-response",
  "requestId": "78539fe0-e9b0-4e4e-8c86-70b36aa93d4f",
  "statusCode": 200,
  "body": {
    "status": "Ok",
    "sell": [
      {
        "ra": "27779.61",
        "ca": "2.02",
        "sa": "2.02",
        "pa": "2.02",
        "co": 1
      }
    ],
    "buy": [
      {
        "ra": "27300",
        "ca": "0.0531304",
        "sa": "0.0531304",
        "pa": "0.0531304",
        "co": 2
      }
    ],
    "timestamp": "1576847127883",
    "seqNo": "40019280"
  }
}

Response details

Key	Type	Description
changes	array
mmarketCode	string	Symbol of the market.
entryType	string	Order type: buy / sell.
rate	decimal	Price of the order.
action	string	Type of change: remove / update. If update will occur you are going to get additional array of state.
state	array	Optional array for active orders.
ra	decimal	Price of the order.
ca	decimal	Current amount of cryptocurrency in the order.
sa	decimal	Starting amount of cryptocurrency in the order.
pa	decimal	Amount of cryptocurrency before the last change.
co	decimal	Amount of orders in the order.
timestamp	Unix Timestamp	Time of execute on server. For this time all above values are actual.