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To place an order, send a message over the WebSocket connection using the following format: 
[
    "placeV3",
    {
        "requestID": "YOUR_UNIQUE_REQUEST_ID",
        "orders": [
            {
                "gameId": "4CASTER_GAME_ID", 
                "bet":  AMOUNT_TO_RISK, 
                "type": "moneyline | spread | total", 
                "side": "PARTICIPANT_ID | over | under", 
                "orderType": "post", 
                "odds": AMERICAN_ODDS, 
                "number": OPTIONAL_HANDICAP_FOR_SPREAD_OR_TOTAL, 
                "userReference": "OPTIONAL_CLIENT_SIDE_IDENTIFIER"
            }
        ] 
    } 
]
Each order object includes:
​
gameId
string
required
The unique ID of the game
​
bet
number
required
The amount to risk on the bet
​
type
string
required
The market type — either “moneyline”, “spread”, or “total”.
​
side
string
required
The participant ID (for moneyline and spread), or “over”/“under” (for total).
​
orderType
string
required
“post” to create a new offer
​
odds
number
required
The odds in American format (e.g., +150 or -110)
​
number
number
The spread or total number (required for “spread” and “total” types).
​
userReference
string
A client-defined identifier to help track the order on your side

​
Response

The server responds to place requests with the request ID and a list of successful order IDs and details. 
{ 
    "data": [
        {
            "number": null,
            "odds": 245,
            "offered": "122.000000",
            "orderID": "67f45377c18c6697c172afa4",
            "side": "6259a766452fb85a6cdd17f6",
            "type": "moneyline",
            "userReference": "YOUR_USER_REFERENCE",
            "wagerRequestID": "67f45377c18c6697c172af9d"
        }
...
    ],
    "requestID": "YOUR_REQUEST_ID"
}