This endpoint enables a Manager Account to transfer funds directly to one of its Managed Accounts, or a Managed Account to push funds back to its Manager Account (more details on account types here). Transfers can only occur between a Manager Account and its directly associated Managed Accounts — transfers between two Managed Accounts are not supported. You will need to pass your API key and the x-reap-entity-id of the account initiating the transfer in the request headers — the fromBusinessUuid in the request body must match the authenticated account.