curl --request POST \
  --url https://api.ai2fin.com/api/transaction-categories/{transactionId}/multiple \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "categories": [
    {
      "categoryId": "<string>",
      "categorySetId": "<string>",
      "isPrimary": true,
      "confidence": 123,
      "assignedBy": "<string>"
    }
  ]
}
'

{
  "success": true,
  "categories": [
    {
      "id": "<string>",
      "transactionId": "<string>",
      "categoryId": "<string>",
      "categorySetId": "<string>",
      "userId": "<string>",
      "isPrimary": true,
      "confidence": 0.5,
      "assignedBy": "user",
      "assignedAt": "2023-11-07T05:31:56Z",
      "notes": "<string>",
      "category": {
        "id": "<string>",
        "name": "<string>",
        "icon": "<string>",
        "color": "<string>",
        "isTaxDeductible": true,
        "taxCategory": "<string>",
        "defaultGstRate": 123
      }
    }
  ]
}