AccountUpdateMulti

Field	Type	Description
`reqId`	`int32`	Unique request identifier used for tracking across EWrapper
`account`	`string`	The IBKR account identifier to affiliate the request with
`modelCode`	`string`	Is used to place an order to a model. For example
`key`	`string`	The value being updated
`value`	`string`	Representative information for a given Key.
`currency`	`string`	The underlying’s currency.