nodes:
  - kind: block
    type: ul_list
    nodes:
      - kind: block
        type: list_item
        nodes:
          - kind: block
            type: paragraph
            nodes:
              - kind: text
                text: First item
      - kind: block
        type: list_item
        nodes:
          - kind: block
            type: paragraph
            nodes:
              - kind: text
                text: Second item
          - kind: block
            type: ol_list
            nodes:
              - kind: block
                type: list_item
                nodes:
                  - kind: block
                    type: paragraph
                    nodes:
                      - kind: text
                        text: First item in the nested list
              - kind: block
                type: list_item
                nodes:
                  - kind: block
                    type: paragraph
                    key: '_selection_key'
                    nodes:
                      - kind: text
                        text: Second item in the nested list