{
  "jsonrpc": "2.0",
  "id": 6,
  "method": "private/create_combo",
  "params": {
    "trades": [
      {
        "instrument_name": "BTC-29APR22-37500-C",
        "amount": "1",
        "direction": "buy"
      },
      {
        "instrument_name": "BTC-29APR22-37500-P",
        "amount": "1",
        "direction": "sell"
      }
    ]
  }
}