curl --location --request POST 'http://dev-cn.your-api-server.com/workspaces/ws-1Ab234/users/role' \
--header 'Content-Type: application/json' \
--data-raw '{
"newRole": "Admin",
"email": "hello@coda.io"
}'
{
"roleChangedAt": "2018-04-11T00:18:57.946Z"
}