curl --request PUT \
  --url https://app2.freyavoice.ai/api/v2/problems/{problemId}/assignees \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "workspaceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "userIds": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}
'

{
  "success": true,
  "data": {
    "message": "<string>",
    "result": {
      "success": true,
      "assignees": [
        {
          "id": "<string>",
          "problemId": "<string>",
          "userId": "<string>",
          "assignedAt": "<string>",
          "userName": "<string>",
          "assignedBy": "<string>"
        }
      ]
    }
  }
}