curl --request POST \
  --url https://sandbox.tight.com/v6/bills \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "data": [
    {
      "name": "Office rent",
      "vendorId": "vnd_28868401",
      "apiName": "BOX",
      "apiSourceId": "ext_123",
      "lineItems": [
        {
          "id": "bli_123456",
          "description": "Office supplies",
          "amount": 5001,
          "apiItemId": "item_123",
          "glAccountId": "gla_38560327"
        }
      ],
      "id": "bll_158998869",
      "billNo": 1001,
      "status": "ACTIVE",
      "billStatus": "OPEN",
      "date": "2025-06-26",
      "customData": {
        "internal_key": "some_internal_key",
        "some_other_field": 23434
      }
    }
  ]
}
'

{
  "result": "SUCCESS",
  "data": [
    {
      "result": "SUCCESS",
      "statusCode": 200,
      "data": {
        "id": "bll_158998869",
        "name": "Office rent",
        "billNo": 1001,
        "status": "ACTIVE",
        "billStatus": "OPEN",
        "date": "2025-06-26",
        "vendor": {
          "id": "vnd_28868401",
          "name": "Gusto"
        },
        "apiName": "QBO",
        "apiSourceId": "ext_123",
        "lineItems": [
          {
            "id": "bli_123456",
            "description": "Office supplies",
            "amount": 5001,
            "apiItemId": "item_123",
            "glAccount": {
              "id": "gla_38560327",
              "name": "Officer(s) Salaries and Wages",
              "accountNo": "60210",
              "type": "EXPENSE",
              "iconUrl": "https://cdn.sandbox.tight.com/icons/glAccountTypes/expense.png"
            }
          }
        ],
        "installments": [
          {
            "id": "istl_123",
            "name": "First installment",
            "dueDate": "2025-07-15",
            "balance": 10000,
            "amountDue": {
              "value": "50.0",
              "type": "AMOUNT"
            }
          }
        ],
        "customData": {
          "internal_key": "some_internal_key",
          "some_other_field": 23434
        }
      },
      "error": [
        {
          "type": "UNKNOWN_ERROR",
          "message": "<string>",
          "param": "<string>"
        }
      ]
    }
  ],
  "error": [
    {
      "type": "UNKNOWN_ERROR",
      "message": "<string>",
      "param": "<string>"
    }
  ]
}