How to design different structures with common parts using inheritance

I've searched a lot about this problem without finding any appreciable result (maybe because i don't have a clear idea of what to ask), then here we are... I have to design two structures derived from two different JSON which they have common parts:

{
  "data": 
    {
      "success": true,
      "updated_ids": [0],
      "not_updated_ids": [0]
    }
}

{
  "data": 
    {
      "success": true,
      "branch_ids":["0"]
    }
}

My idea is to create something like this:

class Response
{
    Data data { get; set; }
}

class Data
{
    bool success { get; set; }
}

class UserResponse : Data
{
    List<int> updatedIds { get; set; }
    List<int> notUpdatedIds { get; set; }
}

class BranchResponse : Data
{
    List<string> branchIds { get; set; }
}

Now my question is: How can i instantiate my two different classes? If I do new Response() i don't get the UserReponse or BranchResponse part and if i do new UserResponse() i don't get the Response part.

Basically i would like to instantiate a variable for each structure, populate it with all the values and then Serialize to create the Json.

Thanks in advance!