json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Task workload",
      "description": "Format of workload that's sending from Gearman Client to Gearman Worker",
      "type": "object",
      "properties": {
          "key": {
              "description": "Request key for sign notifications and data in storage",
              "type": "string"
          },
          "commands": {
              "description": "Array of commands",
              "type": "array",
              "minItems": 1,
              "items": {
                  "type": "object",
                  "properties": {
                      "name": {
                          "description": "Name of command",
                          "type": "string"
                      },
                      "params": {
                          "description": "Array of command params with key => value pairs",
                          "type": "object"
                      }
                  },
                  "required": [
                      "name"
                  ]
              }
          }
      }
  }