-(void)startPostRequest:(NSString *)url params:(NSDictionary *)params{
    
    [self.delegate networkStared:self];
    
    NSLog(@"POST URL : %@", url);
    
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json",@"text/html", nil];
    
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    
    [manager POST:url parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
        
        [NOVUtils log:@"NetworkHandler Success " message:[responseObject description]];
        
        [self.delegate networkFinished:responseObject networkHandler:self] ;
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        
        [NOVUtils log:@"NetworkHandler Failed" message:[error description]];
        
        [self.delegate networkFailed:error networkHandler:self] ;
        
    }];
    
}