Expression evaluation that can replace with a parameter key

[geowalrus4gh]

I am trying to apply a secret via kubevela. Secret contains an embedded json in a field named 'config'. is there any way to replace a parameter key inside of that json content? I want to set params.serverURL to json in the config. is there an expression syntax that can replace it with the value? for example ${params.serverURL} as show below?

  name: test-secret
  type: k8s-objects
  inputs:
    - from: clusterId
      parameterKey: properties.params.serverURL
    - from: clusterEndpoint
      parameterKey: properties.params.clusterName
    - from: clusterCAData
      parameterKey: properties.params.data
  properties:
    objects:
    - apiVersion: v1
      kind: Secret
      metadata:
        name: test-secret
      type: Opaque
      stringData:
        name: server1
        server: test.server.com
        config: |
          {
            "serverName": {
              "clusterName": "${params.serverURL}",
              "url": "${params.serverURL}"
            }
          }