Project-AS/Assets/_MAIN/Scripts/Core/ScriptAction.cs

using System.Collections.Generic;

public class ScriptAction
{
    public string Type { get; set; }
    public Dictionary<string, object> Params { get; set; } = new Dictionary<string, object>();
    public List<Dictionary<string, string>> Choices { get; set; }

    public string GetParam(string key, string defaultValue = "")
    {
        return Params.ContainsKey(key) ? Params[key].ToString() : defaultValue;
    }
}