get list of NFT owned by address, grouped by collection

curl --request GET \
  --url https://eth.blockscout.com/api/v2/addresses/{address_hash}/nft/collections

{
  "items": [
    {
      "token": {
        "circulating_market_cap": "83606435600.3635",
        "icon_url": "https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/0xdAC17F958D2ee523a2206206994597C13D831ec7/logo.png",
        "name": "Tether USD",
        "decimals": "6",
        "symbol": "USDT",
        "address": "0x394c399dbA25B99Ab7708EdB505d755B3aa29997",
        "type": "ERC-20",
        "holders": "837494234523",
        "exchange_rate": "0.99",
        "total_supply": "10000000"
      },
      "amount": "1",
      "token_instances": [
        {
          "is_unique": true,
          "id": "431",
          "holder_address_hash": "0x394c399dbA25B99Ab7708EdB505d755B3aa29997",
          "image_url": "example.com/picture.png",
          "animation_url": "example.com/video.mp4",
          "external_app_url": "d-app.com",
          "metadata": {
            "year": 2023,
            "tags": [
              "poap",
              "event"
            ],
            "name": "Social Listening Committee #2 Attendees",
            "image_url": "https://assets.poap.xyz/chanel-poap-4c-2023-logo-1675083420470.png",
            "home_url": "https://app.poap.xyz/token/6292128",
            "external_url": "https://api.poap.tech/metadata/99010/6292128",
            "description": "This is the POAP for attendees of the second Social Listening Committee.",
            "attributes": [
              {
                "value": "01-Feb-2023",
                "trait_type": "startDate"
              },
              {
                "value": "01-Feb-2023",
                "trait_type": "endDate"
              },
              {
                "value": "false",
                "trait_type": "virtualEvent"
              },
              {
                "value": "Paris",
                "trait_type": "city"
              },
              {
                "value": "France",
                "trait_type": "country"
              },
              {
                "value": "https://www.chanel.com",
                "trait_type": "eventURL"
              }
            ]
          },
          "owner": {
            "hash": "0xEb533ee5687044E622C69c58B1B12329F56eD9ad",
            "implementation_name": "implementationName",
            "name": "contractName",
            "ens_domain_name": "domain.eth",
            "metadata": {
              "slug": "tag_slug",
              "name": "Tag name",
              "tagType": "name",
              "ordinal": 0,
              "meta": {}
            },
            "is_contract": true,
            "private_tags": [
              {
                "address_hash": "0xEb533ee5687044E622C69c58B1B12329F56eD9ad",
                "display_name": "name to show",
                "label": "label"
              }
            ],
            "watchlist_names": [
              {
                "display_name": "name to show",
                "label": "label"
              }
            ],
            "public_tags": [
              {
                "address_hash": "0xEb533ee5687044E622C69c58B1B12329F56eD9ad",
                "display_name": "name to show",
                "label": "label"
              }
            ],
            "is_verified": true
          },
          "token": null,
          "token_type": "ERC-721",
          "value": "1"
        }
      ]
    }
  ],
  "next_page_params": {
    "token_contract_address_hash": "0xb81afe27c103bcd42f4026cf719af6d802928765",
    "token_type": "ERC-721"
  }
}