Hi, I'm looking at using Apache Nifi as a data integration hub for our case/archive management solution used in the Nordics and our rest-based API.   One use case is to first read an XML from one source with a few values and then use these values in a larger JSON payload that creates a new case in our solution with InvokeHTTP. All values in the JSON arrays are inside a parameter{} node and can have objects with child properties.   I've done a lot of research and testing with the different processors, like ReplaceText, and AttributesToJSON, but can't find how I easily can do this.   Is it needed to use some complex JSON generator like Groovy or Jolt to achieve this with ExecuteScript?   With a online tool like make.com I was able to do this really easy, but find it complex to just replace multiple single values in the JSON payload before InvokeHHTP when the JSON payload is nested.   Example of a JSON payload for the API can be something like below, but can also contain many other values and nested objects. I want to replace a few of these values, like those in <bold> with values/parameters from the XML input   {   "parameter": {     "Title": "<titlefromXML>",     "Casetype":"recno:18",         "ExternalId": {       "Id": "<guid>",       "Type": "NiFi"     },  "UnregisteredContacts": [       {         "Role": "recno:17",         "ContactName": "Organization name"       },         {         "Role": "recno:9",         "ContactName": "<Contact Name>"       }     ],     "SubArchive":"Test archive",         "ArchiveCodes": [       {         "ArchiveCode": "22",         "ArchiveType": "recno:60001",         "Sort": "1"       }     ]   } }   Thank you for any pointers!   Regards, Willy T. Koch Norway ... View more