[FSSDK-11494] fix UserAttributes type (#1042) #1173

Job	Run time
lint	1m 26s
unit_tests (18)	1m 58s
unit_tests (20)	1m 53s
unit_tests (22)	1m 51s
fullstack_production_suite / test	3s
integration_tests / test	4s
lint_markdown_files / lint	1m 2s
Coveralls coverage	4s
	8m 21s

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