json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "description": "Some common definitions",
      "type": "object",
      "definitions": {
          "id": {
              "description": "Unique identifier.",
              "readOnly": true,
              "format": "uuid",
              "example": "01234567-89ab-cdef-0123-456789abcdef",
              "type": "string",
              "minLength": 1
          },
          "created_at": {
              "description": "Creation time.",
              "example": "2014-07-25T19:14:29.503Z",
              "format": "date-time",
              "readOnly": true,
              "type": "string"
          },
          "updated_at": {
              "description": "Update date-time.",
              "example": "2014-07-25T19:14:29.503Z",
              "format": "date-time",
              "readOnly": false,
              "type": "string"
          },
          "email": {
              "description": "Email",
              "format": "email",
              "readOnly": false,
              "type": "string",
              "minLength": 1
          },
          "password": {
              "description": "password",
              "readOnly": false,
              "type": "string",
              "minLength": 1
          }
      },
      "properties": {
          "id": {
              "$ref": "#/definitions/id"
          },
          "created_at": {
              "$ref": "#/definitions/created_at"
          },
          "updated_at": {
              "$ref": "#/definitions/updated_at"
          },
          "email": {
              "$ref": "#/definitions/email"
          },
          "password": {
              "$ref": "#/definitions/password"
          }
      },
      "required": [
          "id",
          "created_at",
          "updated_at",
          "email",
          "password"
      ]
  }