tx 0xef273c0b7a9d171c7a5b7344b23ec86e4d06d490f6e9c2ccc93c8d8f4fa6188cCopy

order would be filled (post-only rejected)

{
  "PlaceOrder": {
    "side": "Long",
    "size": 5000000,
    "price": 478000000,
    "market_id": 5,
    "post_only": true,
    "stop_loss": null,
    "account_id": 27,
    "order_type": "Limit",
    "reduce_only": false,
    "take_profit": null,
    "time_in_force": "GTC",
    "trigger_price": null
  }
}