Confusing NotionAPI Validation Error (Javascript)

I am submitting the following object with my request to notion.pages.create():

{
    parent: {
        type: 'database_id',
        database_id: databaseID
    },
    properties: {
        Name: { 
            title: [ {
                    type: 'text',
                    text: {
                        content: 'Expense1',
                        link: null
                    },
                    annotations: {
                        bold: false,
                        italic: false,
                        strikethrough: false,
                        underline: false,
                        code: false,
                        color: 'default'
                    },
                    plain_text: 'Expense1',
                    href: null
            } ] 
        },
        Date: { date: { start: '2023-06-23' } },
        Amount: { number: 9.56 },
        Subcategory: []
    }
}

The Name is my title property, Date is a date, Amount is a dollar number, and Subcategory is a relation (Category is a rollup so I am omitting it in the request).

I get this error on my request:

"@notionhq/client warn: request fail {
  code: 'validation_error',
  message: 'body failed validation. Fix one:\n' +
    'body.properties.Name.id should be defined, instead was `undefined`.\n' +
    'body.properties.Name.name should be defined, instead was `undefined`.\n' +
    'body.properties.Name.start should be defined, instead was `undefined`.'
}

This is confusing to me as it conflicts with the way that the API docs describe how to fill in each property type. Also, when I change the order of the properties, the same error comes up (for example, it says 'body.properties.Amount.id should be defined...' instead of body.properties.Name). Anyone have any insight?

I tried changing the order of the objects and checking over my syntax to match the API docs several times, but to no avail.

Solution

So as an update for anyone who's having similar issues:

First of all, the suggestions in the Notion API's error messages were not helpful for me. I ended up resolving the problem by querying my database for some of the existing rows and mimic'ing their structure. Basically like this:

import { Client } from "@notionhq/client"
const notion = new Client({ auth: process.env.NOTION_KEY })

const result2 = await notion.databases.query({ database_id: expensesID });
console.log(result2.results[0].properties);

{
  parent: {
    type: 'database_id',
    database_id: databaseID
  },
  properties: {
    Date: { id: '%5CINz', type: 'date', date: { start: '2023-06-23', end: null, time_zone: null } },
    Amount: { id: 'T%3AsA', type: 'number', number: 9.56 },
    Subcategory: {
      id: 'vxSu',
      type: 'relation',
      relation: [Array],
      has_more: false
    },
    Name: { id: 'title', type: 'title', title: [
  {
    type: 'text',
    text: {
      content: 'Expense1',
      link: null
    },
    annotations: {
      bold: false,
      italic: false,
      strikethrough: false,
      underline: false,
      code: false,
      color: 'default'
    },
    plain_text: 'Expense1',
    href: null
  }
] }
  }
}

Note that the main difference is that each property has an 'id' prop and a 'type' prop. The order of the properties did not matter. Hope this helps someone!