我有这个测试 Postman 流。“发送请求”块调用 Postman echo API。

下面是我在postman echo API上使用的查询。

作为一个测试，我想从第一个“发送请求”块的响应中获取ParamKey1的值，并将其设置为第二个“发送请求”块的ParamKey2的值。因此，终端应该输出如下所示的内容：

--- [11:10:62]
data:
  status: '200'
  body:
    args:
      ParamKey1: ParamValue1
      ParamKey2: ParamValue1
    headers:
      x-forwarded-proto: https
      x-forwarded-port: '443'
      host: www.postman-echo.com
      x-amzn-trace-id: Root=1-635c1747-3f6540ef480363162df797d5
      headerkey1: HeaderValue1
      accept: application/json
      content-type: application/json
      user-agent: PostmanRuntime/7.29.2
      cache-control: no-cache
      postman-token: 65e322d6-0902-409e-aa33-06708fd968d7
      accept-encoding: 'gzip, deflate, br'
      cookie: >-
        sails.sid=s%3A9xptL5itn2oEwj4NxkYfXoSsDgS13YWi.iaAtzHY1w0Eruqz%2FE%2FqNvWXBCveZAxR%2BTexowwOnjF0
    url: 'https://www.postman-echo.com/get?ParamKey1=ParamValue1&ParamKey2=OK'
  headers:
    Date: 'Fri, 28 Oct 2022 17:54:15 GMT'
    Content-Type: application/json; charset=utf-8
    Content-Length: '640'
    Connection: keep-alive
    ETag: W/"280-JzDhIiJr9HLb7DpmhfeDR5s/2T8"
    Vary: Accept-Encoding
    set-cookie: >-
      sails.sid=s%3AmRRu0ezsQK6_4JXiBy0AwjwJdt9sep8j.fe%2F%2Blx4Fx6wtY5MFUpSkdJQ3JqJFoUFM9MaohQeuLkc;
      Path=/; HttpOnly
  http:
    statusCode: 200
    statusMessage: OK
    responseTime: 253
'@durable': {}

现在它只给予我一个选项来获取作为字符串的主体，如下所示：

我怎样才能让我上面描述的工作呢？