curl --request GET \
  --url https://fcontext.com/api/aitaquote/quote/subscriptions \
  --header 'x-api-key: <api-key>'

{
  "subscriptions": [
    {
      "symbol": "<string>",
      "subTypes": [
        123
      ],
      "candlesticks": [
        123
      ]
    }
  ]
}