tx 0x16353ea8e856543f21bbae679b5f6bad4867868a5756135b33e4f3f5402e8a0fCopy

order would be filled (post-only rejected)

{
  "PlaceOrder": {
    "side": "Long",
    "size": 5000000,
    "price": 29870000000,
    "market_id": 3,
    "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
  }
}