Filter an NSArray of NSDictionary with NSPredicate

NSPredicate *filter = [NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) {
        return [[evaluatedObject valueForKeyPath:@"activity.object.type"]
                isEqualToString:@"FILTER-TEXT-VALUE"];
}];
NSArray *new_array = [you-array filteredArrayUsingPredicate:filter];