FillSubaccountMessage
id: FillId
subaccountId: SubaccountId
side: OrderSide
liquidity: Liquidity
type: FillType
clobPairId: ClobPairId
size: Quantity
price: Price
quoteAmount: string
eventId: string
transactionHash: string
createdAt: DateTime
createdAtHeight: Height
ticker: Ticker
orderId: OrderId ⊕
clientMetadata: ClientMetadata ⊕