Assignee id is showing error

When i am using the bulk issue creation assignee id field alone throws error

I used the same format as given in the below link “https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issues/#api-rest-api-3-issue-bulk-post

Hi @RamachandranGunaseka,

Can you share the request you sent and the response you got? I tried the API with this request body and I got a successful response

{
    "issueUpdates":
    [
        {
            "fields":
            {
                "summary": "Main order flow broken",
                "issuetype":
                {
                    "id": "10005"
                },
                "project":
                {
                    "id": "10001"
                },
                "description":
                {
                    "type": "doc",
                    "version": 1,
                    "content":
                    [
                        {
                            "type": "paragraph",
                            "content":
                            [
                                {
                                    "text": "Order entry fails when selecting supplier.",
                                    "type": "text"
                                }
                            ]
                        }
                    ]
                },
                "assignee":
                {
                    "id": "<account ID here>"
                }
            }
        }
    ]
}

Cheers,
Ian