Convert previously downloaded notion blocks to markdown

[YasielCabrera]

Is there a way to convert notion blocks "offline" without connecting to notion through the notion client?

My use case: I download some pages and databases using the notion API, process them, do some stuff, and store the notion response. Later, a tool should use notion-to-md to convert some blocks to markdown, but at that stage, it shouldn't connect to notion.

Edit: What I actually need to transform is a rich_text block/section (no 100% sure what would be the exact name in the Notion definitions)

Having something similar to the following "json" I would need to transform properties.Description into Markdown

{
  "properties": {
    "Description": {
      "rich_text": [
        {
          "type": "text",
          "text": {
            "content": "There is some ",
            "link": null
          },
          "annotations": {
            "bold": false,
            "italic": false,
            "strikethrough": false,
            "underline": false,
            "code": false,
            "color": "default"
          },
          "plain_text": "There is some ",
          "href": null
        },
        {
          "type": "text",
          "text": {
            "content": "text",
            "link": null
          },
          "annotations": {
            "bold": true,
            "italic": false,
            "strikethrough": false,
            "underline": false,
            "code": false,
            "color": "default"
          },
          "plain_text": "text",
          "href": null
        },
        {
          "type": "text",
          "text": {
            "content": " in this property!",
            "link": null
          },
          "annotations": {
            "bold": false,
            "italic": false,
            "strikethrough": false,
            "underline": false,
            "code": false,
            "color": "default"
          },
          "plain_text": " in this property!",
          "href": null
        }
      ]
    }
  }
}