tx 0xe9e9129c8fc9e15490e9aa4aa49eab1fd04b45f5ddb68e509960ee74cc3fa06fCopy

order would be filled (post-only rejected)

{
  "PlaceOrder": {
    "side": "Short",
    "size": 472105803,
    "price": 21510000000,
    "market_id": 1,
    "post_only": true,
    "stop_loss": null,
    "account_id": 42,
    "order_type": "Limit",
    "reduce_only": false,
    "take_profit": null,
    "time_in_force": "GTC",
    "trigger_price": null
  }
}