curl --request GET \
  --url https://api.chainbase.online/v1/nft/metadata \
  --header 'x-api-key: <x-api-key>'

{
  "code": 0,
  "message": "ok",
  "data": {
    "blockchain": "<string>",
    "contract_address": "<string>",
    "token_id": "<string>",
    "erc_type": "<string>",
    "name": "<string>",
    "owner": "<string>",
    "symbol": "<string>",
    "image_uri": "<string>",
    "mint_time": 123,
    "mint_transaction_hash": "<string>",
    "token_uri": "<string>",
    "metadata": "<unknown>",
    "traits": "<unknown>",
    "rarity_score": 123,
    "rarity_rank": 123
  }
}