Converting JSON value to dictionary

Hello, I am attempting to convert this into Appian values, but I am having trouble. 

What would be the best way to convert this?

Here is the raw response from an API:

{"response":"{\"requestId\":\"123456\",\"status\":0,\"description\":\"Success.\",\"response\":{\"transactionId\":\"12241094986\",\"payfoneAlias\":\"432432424\",\"phoneNumber\":\"324324324234\",\"lineType\":\"Mobile\",\"carrier\":\"T-Mobile USA\",\"countryCode\":\"US\",\"statusIndex\":\"51\",\"isBaselined\":true,\"score\":1000,\"phoneNumberVelocity\":0,\"portVelocity\":0,\"payfoneTenure\":{\"minimumDate\":\"2024-08-05T23:59:59.000Z\"},\"phoneNumberTenure\":{\"minimumDate\":\"2024-08-05T23:59:59.000Z\"}}}"}

a!localVariables(
  local!callService: rule!score(
    customerPhoneNumber: ri!phoneNumber,
    consentStatus: ri!consentStatus
  ).result.body,
  local!jsonArray: a!toJson(
    value: local!callService,
    removeNullOrEmptyFields: true
  ),
  local!jsonArrays: a!fromJson(local!jsonArray),
  local!jsonArrays
)

Here is the result after testing above code:

[response:{"requestId":"123456","status":0,"description":"Success.","response":{"transactionId":"12241091363","payfoneAlias":"432432424","phoneNumber":"324324324234","lineType":"Mobile","carrier":"T-Mobile USA","countryCode":"US","statusIndex":"51","isBaselined":true,"score":1000,"phoneNumberVelocity":0,"portVelocity":0,"payfoneTenure":{"minimumDate":"2024-08-05T23:59:59.000Z"},"phoneNumberTenure":{"minimumDate":"2024-08-05T23:59:59.000Z"}}}]