json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Pubmatic Adapter Params",
      "description": "A schema which validates params accepted by the Pubmatic adapter",
      "type": "object",
      "properties": {
          "publisherId": {
              "type": "string",
              "description": "An ID which identifies the publisher"
          },
          "adSlot": {
              "type": "string",
              "description": "An ID which identifies the ad slot"
          },
          "wrapper": {
              "type": "object",
              "description": "Specifies pubmatic openwrap configuration for a publisher",
              "properties": {
                  "profile": {
                      "type": "integer",
                      "description": "An ID which identifies the openwrap profile of publisher"
                  },
                  "version": {
                      "type": "integer",
                      "description": "An ID which identifies version of the openwrap profile"
                  }
              },
              "required": [
                  "profile"
              ]
          },
          "keywords": {
              "type": "array",
              "minItems": 1,
              "items": {
                  "type": "object",
                  "description": "A key with one or more values associated with it. These are used in buy-side segment targeting.",
                  "properties": {
                      "key": {
                          "type": "string"
                      },
                      "value": {
                          "type": "array",
                          "minItems": 1,
                          "items": {
                              "type": "string"
                          }
                      }
                  },
                  "required": [
                      "key",
                      "value"
                  ]
              }
          }
      },
      "required": [
          "publisherId"
      ]
  }