curl --request POST \
  --url https://api.upwell.com/api/rest/bills \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": {
    "billLineItems": {},
    "billLineItemsLastUpdatedAt": "2023-11-07T05:31:56Z",
    "carrierId": "<string>",
    "checkOrAchNumber": "<string>",
    "createdAt": "2023-11-07T05:31:56Z",
    "currency": "AED",
    "dueDate": "<string>",
    "id": "<string>",
    "issueDate": "<string>",
    "notes": "<string>",
    "payToAccount": "<string>",
    "proNumber": "<string>",
    "referenceNumber": "<string>",
    "sourceSystem": "<string>",
    "sourceSystemId": "<string>",
    "sourceSystemMeta": "<unknown>",
    "status": "<string>",
    "tenantId": "<string>",
    "terms": "<string>",
    "totalAmount": 123,
    "updatedAt": "2023-11-07T05:31:56Z",
    "vendor": {},
    "vendorId": "<string>"
  }
}
'

{
  "createBill": {
    "billLineItems": [
      {
        "createdAt": "2023-11-07T05:31:56Z",
        "description": "<string>",
        "id": "<string>",
        "item": "<string>",
        "lineNumber": "<string>",
        "quantity": 123,
        "sourceSystem": "<string>",
        "sourceSystemId": "<string>",
        "totalAmount": 123,
        "unitPrice": 123,
        "updatedAt": "2023-11-07T05:31:56Z"
      }
    ],
    "carrierId": "<string>",
    "checkOrAchNumber": "<string>",
    "createdAt": "2023-11-07T05:31:56Z",
    "currency": "AED",
    "dueDate": "<string>",
    "id": "<string>",
    "issueDate": "<string>",
    "notes": "<string>",
    "payToAccount": "<string>",
    "proNumber": "<string>",
    "referenceNumber": "<string>",
    "sourceSystem": "<string>",
    "sourceSystemId": "<string>",
    "sourceSystemMeta": "<unknown>",
    "status": "<string>",
    "terms": "<string>",
    "totalAmount": 123,
    "updatedAt": "2023-11-07T05:31:56Z",
    "vendor": {
      "createdAt": "2023-11-07T05:31:56Z",
      "id": "<string>",
      "name": "<string>",
      "sourceSystem": "<string>",
      "sourceSystemId": "<string>",
      "sourceSystemMeta": "<unknown>",
      "updatedAt": "2023-11-07T05:31:56Z"
    },
    "vendorId": "<string>"
  }
}