{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/column-formatting.schema.json",
  "elmType": "div",
  "children": [
    {
      "elmType": "span",
      "style": {
        "display": "inline-block",
        "padding": "0 2px"
      },
      "attributes": {
        "iconName": {
          "operator": "?",
          "operands": [
            {
              "operator": ">=",
              "operands": [
                "@currentField",
                "90"
              ]
            },
            "Emoji",
            {
              "operator": "?",
              "operands": [
                {
                  "operator": ">=",
                  "operands": [
                    "@currentField",
                    "75"
                  ]
                },
                "Emoji2",
                {
                  "operator": "?",
                  "operands": [
                    {
                      "operator": ">=",
                      "operands": [
                        "@currentField",
                        "60"
                      ]
                    },
                    "EmojiNeutral",
                    {
                      "operator": "?",
                      "operands": [
                        {
                          "operator": ">=",
                          "operands": [
                            "@currentField",
                            "0"
                          ]
                        },
                        "EmojiDisappointed",
                        "Unknown"
                      ]
                    }
                  ]
                }
              ]
            }
          ]
        }
      }
    },
    {
      "elmType": "span",
      "txtContent": "@currentField"
    }
  ]
}