tx 0x78c0e810ee9b2e46e07c1ab3fdae3e2ad9f14bb63c7b511ff8c206a54e88480aCopy

order would be filled (post-only rejected)

{
  "PlaceOrder": {
    "side": "Short",
    "size": 310810905,
    "price": 21513000000,
    "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
  }
}