{
  "type": "object",
  "properties": {
    "symbol": {
      "type": "string",
      "description": "The symbol of the ship that was purchased."
    },
    "price": {
      "type": "integer",
      "description": "The price of the transaction.",
      "minimum": 1
    },
    "agentSymbol": {
      "type": "string",
      "description": "The symbol of the agent that made the transaction."
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "The timestamp of the transaction."
    }
  },
  "required": [
    "symbol",
    "price",
    "agentSymbol",
    "timestamp"
  ]
}