curl --request POST \
  --url https://api.tickflow.org/v1/instruments \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "symbols": [
    "<string>"
  ]
}
'

{
  "data": [
    {
      "code": "<string>",
      "exchange": "<string>",
      "region": "<string>",
      "symbol": "<string>",
      "ext": {
        "type": "cn_equity",
        "float_shares": 123,
        "limit_down": 123,
        "limit_up": 123,
        "listing_date": "<string>",
        "name_en": "<string>",
        "tick_size": 123,
        "total_shares": 123
      },
      "name": "<string>",
      "type": "stock"
    }
  ]
}