json_schema: {
      "title": "Invocation manifest for OpenSlide to PNG file converter",
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "config": {
              "type": "object",
              "properties": {
                  "gear-log-level": {
                      "default": "INFO",
                      "type": "string",
                      "enum": [
                          "ERROR",
                          "WARNING",
                          "INFO",
                          "DEBUG"
                      ]
                  }
              },
              "required": [
                  "gear-log-level"
              ]
          },
          "inputs": {
              "type": "object",
              "properties": {
                  "image": {
                      "type": "object",
                      "properties": {}
                  }
              },
              "required": [
                  "image"
              ]
          }
      },
      "required": [
          "config",
          "inputs"
      ]
  }