resubmitInstanceStep - input issue


I have an issue getting the correct input for the service wm.monitor.instanceControl:resubmitInstanceStep in a Flow service. I use the service pub.monitor.process.instanceStep:getStepDetails to get the information regarding a process model I want to resubmit. The problem is that the pipeline (stepPipeline) from the getStepDetails is in the format of a IS document and the input for resubmitInstanceStep is an object list.

Using both the document (from getStepDetails) and a object list (transformed in a custom Java servce) generates the same error when used as input:

[wm.monitor.instanceControl:resubmitInstanceStep] Missing input from pipeline: stepPipeline

Does anyone know how to get the correct format of the stepPipeline.