curl --request POST \
  --url https://public-api.etoro.com/api/v1/watchlists/default-watchlist/selected-items \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --header 'x-request-id: <x-request-id>' \
  --header 'x-user-key: <x-user-key>' \
  --data '
[
  {
    "itemId": 12345,
    "itemType": "Instrument",
    "itemRank": 1,
    "itemAddedReason": "Manual",
    "itemAddedDate": "2023-11-07T05:31:56Z",
    "market": {
      "id": "<string>",
      "symbolName": "<string>",
      "displayName": "<string>",
      "assetTypeId": 123,
      "assetTypeSubCategoryId": 123,
      "exchangeId": 123,
      "hasExpirationDate": true,
      "avatar": {
        "small": "<string>",
        "medium": "<string>",
        "large": "<string>",
        "svg": {
          "url": "<string>",
          "backgroundColor": "<string>",
          "textColor": "<string>"
        }
      }
    }
  }
]
'

{
  "status": 200,
  "watchlists": [
    {
      "watchlistId": "12345",
      "name": "Tech Watchlist",
      "Gcid": 12345,
      "watchlistType": "Static",
      "totalItems": 100,
      "isDefault": true,
      "isUserSelectedDefault": true,
      "watchlistRank": 1,
      "dynamicUrl": "<string>",
      "items": [
        {
          "itemId": 12345,
          "itemType": "Instrument",
          "itemRank": 1
        }
      ],
      "relatedAssets": [
        12345,
        67890
      ]
    }
  ],
  "exception": {
    "invalidItems": [
      "<string>"
    ],
    "reason": "<string>",
    "message": "<string>"
  },
  "meta": {
    "pageNumber": 0,
    "itemsPerPage": 100,
    "maxItemsInWatchlistLimit": 1000,
    "maxWatchlistsLimit": 10
  },
  "isSucceeded": true
}