I have the follow structure:

{
  "comments": {
    "-ROOM_KEY_A": {
      "-COMMENT_KEY_A": {
        "text": "...",
        "comments": [ // REPLYING COMMENTS
           { text: "..",
        ]
      },
      "-COMMENT_KEY_B": {
        "text": "...",
      }
    }
  }
}

So, my question is how is the best way to read and push reply comments into firebase?