getAssetsByAuthority

curl --request POST \
  --url 'https://mainnet.helius-rpc.com/?api-key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getAssetsByAuthority",
  "params": {
    "authorityAddress": "2RtGg6fsFiiF1EQzHqbd66AhW7R5bWeQGpTbv2UMkCdW"
  }
}
'

{
  "jsonrpc": "2.0",
  "result": {
    "last_indexed_slot": 365750752,
    "total": 1,
    "limit": 1,
    "page": 1,
    "items": [
      {
        "interface": "ProgrammableNFT",
        "id": "JEGruwYE13mhX2wi2MGrPmeLiVyZtbBptmVy9vG3pXRC",
        "content": {
          "$schema": "https://schema.metaplex.com/nft1.0.json",
          "json_uri": "https://madlads.s3.us-west-2.amazonaws.com/json/6867.json",
          "files": [
            {
              "uri": "https://madlads.s3.us-west-2.amazonaws.com/images/6867.png",
              "cdn_uri": "https://cdn.helius-rpc.com/cdn-cgi/image//https://madlads.s3.us-west-2.amazonaws.com/images/6867.png",
              "mime": "image/png"
            }
          ]
        },
        "authorities": [
          {
            "address": "2RtGg6fsFiiF1EQzHqbd66AhW7R5bWeQGpTbv2UMkCdW",
            "scopes": [
              "full"
            ]
          }
        ],
        "compression": {
          "eligible": false,
          "compressed": false,
          "data_hash": "",
          "creator_hash": "",
          "asset_hash": "",
          "tree": "",
          "seq": 0,
          "leaf_id": 0
        },
        "grouping": [
          {
            "group_key": "collection",
            "group_value": "J1S9H3QjnRtBbbuD4HjPV6RpRhwuk4zKbxsnCHuTgh9w"
          }
        ],
        "royalty": {
          "royalty_model": "creators",
          "target": null,
          "percent": 0.042,
          "basis_points": 420,
          "primary_sale_happened": true,
          "locked": false
        },
        "creators": [
          {
            "address": "5XvhfmRjwXkGp3jHGmaKpqeerNYjkuZZBYLVQYdeVcRv",
            "share": 0,
            "verified": true
          }
        ],
        "ownership": {
          "frozen": true,
          "delegated": false,
          "delegate": null,
          "ownership_model": "single",
          "owner": "3F21SJs4FMpsakrxmd8GjgfQZG6BN6MVsvXcm5Yc6Jcf"
        },
        "burnt": "<unknown>"
      }
    ]
  }
}