public static int[] GetFromFromBlock(string block)
{
var stringItemArray = Regex.Match(block, "(?<=\"from\":\\[).*?(?=])").ToString().Split(',');
if (stringItemArray[0].Length < 4)
return null;
var intItemArray = new int[stringItemArray.Length];
for (int i = 0; i < stringItemArray.Length; i++)
intItemArray[i] = int.Parse(stringItemArray[i].Replace("\"", ""));
return intItemArray;
}