API Pass Into Multi-User Picker Field

Question

Can somebody help me with the below API call? Pretty sure it's just a formatting issue but I can't figure out the appropriate format. I'm getting the following error:

"Field with id 'customfield_40197' named 'Request Participants.' has these errors : expected Object"

customField_40197 is a multi-user picker field. I don't believe the issue is email over accountID because 20533 is a single-user picker field and it accepts email just fine as does raiseOnBehalfOf.

{  
"raiseOnBehalfOf":"surajan@corelogic.com",
"serviceDeskId":"12",
"requestTypeId":"496",
"requestFieldValues": {
     "customfield_40197":["kchary@corelogic.com"],
    "summary":"Terminate a user - nkinitestapi@corelogic.com",
    "customfield_20533":"nkinitestapi@corelogic.com",
    "customfield_20569":"2018-03-29"
    }
}

Thanks,
Mathew

Florian Bonniec · Accepted Answer

Hi @Mathew Lederman

Have you try the following format ?

{
"fields": {
"customfield_40197": [
{"accountId": "<ACCOUNTID>"}
]
}
}

or

{
"fields": {
"customfield_40197": [
{"emailAddress": "kchary@corelogic.com"}
]
}
}

Regards