User Transactions

{
  "method": "subscribe",
  "subscription": {
    "type": "userTransactions",
    "user": "0x1111111111111111111111111111111111111111"
  }
}

{
  "channel": "userTransactions",
  "data": {
    "user": "0x1111111111111111111111111111111111111111",
    "transaction": {
      "transactionId": "0x1234...",
      "type": "OrderPlaced",
      "timestamp": 1701234567890,
      "blockNumber": 12345,
      "txIndex": 0,
      "orderId": "0x5678...",
      "data": {}
    }
  }
}