How to add Woocomerce product attribute without knowing its id?

Question

C++ / C#

I am making my own commerceML upload algorithm on .net core, I have parsed its values ​​and I have product properties and a group of properties.
According to the Woocomerce API documentation, adding a product attribute and its value is as follows

"attributes": [
    {
      "id": 6,
      "position": 0,
      "visible": false,
      "variation": true,
      "options": [
        "Black",
        "Green"
      ]
    },
    {
      "name": "Size",
      "position": 0,
      "visible": true,
      "variation": true,
      "options": [
        "S",
        "M"
      ]
    }
  ],

However, if the product attribute is added without specifying its id, then it becomes individual , which makes it impossible to make any filter on it.
Question: How can I add a product attribute without its id, binding it to existing attributes?