public function moveManagedAccount($clientCustomerId, $oldManagerCustomerId, $newManagerCustomerId)
{
$masterAccountId = $this->getMasterAccount()->getClientCustomerId(); // master account is our main MCC account with credentials
$managedCustomerService = $this->_getService('ManagedCustomerService', $masterAccountId);
$operation = new \MoveOperation();
$operation->oldManagerCustomerId = $oldManagerCustomerId;
$operation->operator = 'SET';
$link = new \ManagedCustomerLink();
$link->clientCustomerId = $clientCustomerId;
$link->linkStatus = 'ACTIVE';
$link->managerCustomerId = $newManagerCustomerId;
$operation->operand = $link;
$operations = [$operation];
return $managedCustomerService->mutateManager($operations);
}