A SHA256 HMAC signature generated using the request body and timestamp.
Format: HMAC_SHA256(JSON.stringify(data) + ’|’ + timestamp), signed using the
provided secret key.
Jackpot pool amount configured for the associated jackpot.
To maintain precision and avoid floating-point errors, the jackpot pool field is processed as an integer value by multiplying the actual amount by 100000.For example, a jackpot pool of 12.34567 will be represented as 1234567 in the API.