in Source/Assets/AppCenterEditorExtensions/Editor/Scripts/AppCenterEditorSDK/SimpleJson.cs [1183:1197]
static bool IsNumeric(object value)
{
if (value is sbyte) return true;
if (value is byte) return true;
if (value is short) return true;
if (value is ushort) return true;
if (value is int) return true;
if (value is uint) return true;
if (value is long) return true;
if (value is ulong) return true;
if (value is float) return true;
if (value is double) return true;
if (value is decimal) return true;
return false;
}