Invenias API Patch request

[research2]

I am trying to make a patch request for Invenias in the swaggerUI but the statuscode I keep getting is 500. I am guessing its something with how I've set up the field data that I am trying to change. The problem is I don't know what the correct format is for accessing a (nested) data field within a people instance. I have tried for example:

{
"Fields:{"DefaultPosition": {
"JobTitle": "Test"
}}
}
{
"Fields:{{"op": "replace", "path": "/DefaultPosition/JobTitle", "value": "test"}
}
{
"Fields:{ "/DefaultPosition/JobTitle":"test"}
}
{
"Fields:{ DefaultPosition.JobTitle:"test"}
}

I hope someone can shed some light on how the fields are meant to be formatted for an Invenias patch request.