curl --request POST \
  --url https://public-api.etoro.com/api/v1/watchlists/{watchlistId}/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>"
        }
      }
    }
  }
]
'