SqlTableDependency_Changed what permission

Hi,

I have 2 database. One is from test with the same database: https://www.codeproject.com/Articles/1029976/SQL-Server-Notifications-on-Record-Change-with-Sig

void SqlTableDependency_Changed(object sender, RecordChangedEventArgs<Posts> e)
{
if (e.ChangeType != ChangeType.None)
{
BroadcastStockPrice(e.Entity);
}
}

and working exchange

I tried to use asp.net database with aspnet_membership with the same table tbl_posts and not working with the same example.

What permission I need?