adding response schema

ExternalService_2

{
    "swagger": "2.0",
    "info": {
       "title": "Sample API",
       "description": "API description in Markdown.",
       "version": "1.0.0"
    },
    "paths": {
       "/": {
          "post": {
             "summary": "sends the id.",
             "consumes": [
                "application/json"
             ],          
          "produces":[
            "application/json"
         ],
          "parameters": [
             {
                "in": "body",
                "name": "id",
                "required": true,
                "schema": {
                   "type": "string"
                }
             }
          ],
          "responses": {
             "202": {
                "description": "Success!",
                "headers": {
                  "status" : {
                    "type" : "string"                    
                  }
                },
              "default": {
      "description": "Unexpected error",
      "schema": {
        "$ref": "#/definitions/Error"
      }
    }
             }
          }
       }
    }
    },
    "definitions": {
    "Error": {
      "type": "object",
      "properties": {
        "code": {
          "type": "string"
        },
        "message": {
          "type": "string"
        }
      },
      "required": [
        "code",
        "message"
      ]
    }
  }
 }

this is what it returns on error, need to add that for 40x
{
"error": {
"code": "DirectApiAuthorizationRequired",
"message": "The request must be authenticated only by Shared Access scheme."
}
}