Get open orders

Example response

{
  "results": [
    {
      "account": "0x4638e3041366aa71720be63e32e53e1223316c7f0d56f7aa617542ed1e7512x",
      "avg_fill_price": "26000",
      "cancel_reason": "NOT_ENOUGH_MARGIN",
      "client_id": "x1234",
      "created_at": 1681493746016,
      "id": "123456",
      "last_updated_at": 1681493746016,
      "market": "BTC-USD-PERP",
      "price": "26000",
      "published_at": 1681493746016,
      "received_at": 1681493746016,
      "remaining_size": "0",
      "seq_no": 1681471234972000000,
      "size": "0.05",
      "timestamp": 1681493746016,
      "trigger_price": "26000"
    }
  ]
}