A problem with remove users from access role

[shachlo10]

Hi ! maybe you can ask from api developers , i dont know where i need to search this info, but my problems is next:

When i want to remove users from access role i always get an error . I action a command set access-role and set parametr "remove" ( this is discribe in a management api docs) . I dont knw is this bag or features , but parametr add is working fine.

{
"code": "generic_err_invalid_parameter",
"message": "Invalid parameter for [users]. Invalid value"
}

Can someone help?
Thanks