QuickSight : Boto3 Create_data_set

Hi We are trying to use Boto3 SDK for QuickSight - we got the PhysicalTableMap part of the input. But we are not able to give LogicalTableMap(we are only able to give DataTransforms for one table, we need to give for multiple tables and ‘Source’ part of LogicalTableMap for joints, if some one can share a sample json of LogicalTableMap={} with data for multiple parts especially RenameColumnOperation and Sources. Any help will be highly appreciated. Error - botocore.errorfactory.InvalidParameterValueException: An error occurred (InvalidParameterValueException) when calling the CreateDataSet operation: LogicalTableMap must have a single root