docs: def with_json_body(self, body):
          """Sets the request body to the provided value and returns the request itself.
          Also sets the Content-Type header to application/json.
  
          Keyword arguments:
          body -- A body that is either accepted by with_body or is convertible to (or is) a dict object.
              If a dict-like object is provided, it will be converted to a json string using json.dumps.
          """
          try:
              self.with_body(json.dumps(dict(body)))
          except:
              try:
                  self.with_body(body)
              except:
                  raise ValueError("Request body must be a string, bytes object, or a dict structure corresponding to a valid JSON.")
          self.header["Content-Type"] = "application/json"
          return self