How to write meta data in S3ExportTaskDefinition

Hi there,

I am trying to write meta data to a file and upload it to s3

here is what i have. I am not sure what is the correct format for the user_metadata

class MediaMeta(BaseModel):
        data:str

s3_export_task_definition = S3ExportTaskDefinition(input_url=self.src_file_path,
                                                           bucket=self.bucket_name,
                                                           key=self.key_to_file,
                                                           user_metadata=meta_data.dict())

thanks for your help