curl --request POST \
  --url https://api.simmer.markets/api/sdk/trade/kalshi/submit \
  --header 'Content-Type: application/json' \
  --data '
{
  "market_id": "<string>",
  "side": "<string>",
  "signed_transaction": "<string>",
  "action": "buy",
  "quote_id": "<string>",
  "reasoning": "<string>",
  "source": "<string>",
  "skill_slug": "<string>"
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}