Remove nested files?

Hi there!
So I have a list of data like this.

{
  "Clans": {
    "OXIDE": [
      "123123123",
      "321321321"
    ]
  }
}

I want to be able to remove a clan tag by simply typing /clan remove <clan> but since the clans are nested within "Clans" above it is not working. The Remove() that oxide provides only takes 1 argument. How can I remove something nested inside of something? This is what the code looks like right now but it is not working since I have 2 arguments inside the Remove(), like this Remove("Clans", clanTag").

void RemoveClan(string clanTag)
{
  if(clanData["Clans", clanTag] != null)
  {
    clanData.Remove("Clans", clanTag);
    clanData.Save();
  }
}

Thanks in advance!

Deleting/removing files isn't really doable via a plugin without the sandbox disabled, or via an extension.