How to get mockup's information via the API?

I have a simple ‘Wireframe’ element and I want to retrieve “test placeholder” string from this input via the API request.

Example request:

curl --request GET \
     --url 'https://api.miro.com/v2/boards/BOARD_ID/items?limit=10' \
     --header 'accept: application/json' \
     --header 'authorization: Bearer API_TOKEN'

And response:

{
  "size": 1,
  "limit": 10,
  "total": 1,
  "data": [
    {
      "id": "ITEM_ID",
      "type": "mockup",
      "links": {
        "self": "https://api.miro.com/v2/boards/BOARD_ID/items/ITEM_ID"
      },
      "createdAt": "2022-10-21T17:58:26Z",
      "createdBy": {
        "id": "USER_ID",
        "type": "user"
      },
      "geometry": {
        "width": 507.5290985795079,
        "height": 101.50581971590158
      },
      "isSupported": false,
      "modifiedAt": "2022-10-21T18:05:45Z",
      "modifiedBy": {
        "id": "USER_ID",
        "type": "user"
      },
      "position": {
        "x": -153.48916664925795,
        "y": 590.8997696991773,
        "origin": "center",
        "relativeTo": "canvas_center"
      }
    }
  ],
  "links": {
    "self": "https://api.miro.com/v2/boards/BOARD_ID/items?limit=10&cursor="
  },
  "type": "cursor-list"
}

There is no specific information about the input item in this response, so i sent another request:

curl --request GET \
     --url https://api.miro.com/v2/boards/BOARD_ID/cards/ITEM_ID \
     --header 'accept: application/json' \
     --header 'authorization: Bearer API_TOKEN'

And received response:

{
  "id": "ITEM_ID",
  "type": "mockup",
  "links": {
    "self": "https://api.miro.com/v2/boards/BOARD_ID/items/ITEM_ID"
  },
  "createdAt": "2022-10-21T17:58:26Z",
  "createdBy": {
    "id": "USER_ID",
    "type": "user"
  },
  "geometry": {
    "width": 507.5290985795079,
    "height": 101.50581971590158
  },
  "isSupported": false,
  "modifiedAt": "2022-10-21T18:05:45Z",
  "modifiedBy": {
    "id": "3074457365154100780",
    "type": "user"
  },
  "position": {
    "x": -153.48916664925795,
    "y": 590.8997696991773,
    "origin": "center",
    "relativeTo": "canvas_center"
  }
}

But still have no needed information.
How can i retrieve data about this wireframe element?