classification json syntax in /businessworkspaces POST request

Hi

I am creating business workspaces using the REST api, and successfully doing so, except that the classification is not getting applied.

Example json body:

body={
 "template_id": 18838,
 "name": "1659316 xxxxxxx",
 "type": 848,
 "parent_id": 4603,
 "description": "",
 "external_source": "",
 "external_identity": "",
 "external_identity_type": "",
 "reference_type": "1",
 "mime_type": "Business Workspace",
 "size": "",
 "roles": {
  "categories": {
   "11622": {
    "11622_2": "****",
    "11622_3": "****",
    "11622_4": "xxxxxxx",
    "11622_5": 1659316,
    "11622_6": "Regional Operations Mgr Energy",
    "11622_7": 1676464,
    "11622_8": "Inactive",
    "11622_9": "GG1",
    "11622_10": "CBRE GWS Ltd.",
    "11622_11": "GWS",
    "11622_12": "GBR",
    "11622_13": "GW",
    "11622_14": "PL0054",
    "11622_15": "Div666",
    "11622_16": 95020,
    "11622_17": 240499,
    "11622_18": 955001,
    "11622_19": "GBR",
    "11622_20": 240499,
    "11622_21": "FM - GWS Intercompany",
    "11622_22": "2010-08-17T00:00:00",
    "11622_23": "2015-09-01T00:00:00",
    "11622_24": 1073034,
    "11622_25": "xxxxxxxxxxxxx",
    "11622_26": "HR",
    "11622_27": "xxxxxxx",
    "11622_28": "2018-10-05T00:00:00",
    "11622_29": "2010-08-17T00:00:00"
   }
  },
  "classifications": {
   "create_id": [
    11188
   ],
   "id": []
  }
 }
}

I copied this format from https://developer.opentext.com/resources/documentation/Integrate%20and%20Access/567f47ed88a1736246ed2943b105f282/page/3

which just says "It’s worth mentioning that also the correct classification information needs to be passed" without actually saying what that information should be, or how it is passed in the json.

my presumption was that create_id array is an array of the classification ids you want to apply, though why we then need the id array, no idea, so maybe we do need that?

Does anyone know how to format the classifications json object?

thanks

Guy.