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I need to create an object that I can pass to an API. The object will hold product information ( RMA info ).<br />
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Here is how I would like the final object structured ideally:<br />

<pre><code id="code-10-29105934-1">RMA Number 43454656
    Created Date: today
    Username: John

    Items In RMA
        UPC Code 5345346565564
        qty 3
        // There are 3 items for example with same UPC
            serialNumber: 4534545435435
            serialNumber: 54356546546546,
            serialNumber: 8678678678768

        Next Upc 090909043543534
        qty 1
            serialNumber: 9890895034545

        etc...</code></pre>
Can someone help me build this as a valid Javascript Object / Json Object please?
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I need to create an object that I can pass to an API. The object will hold product information ( RMA info ).

Here is how I would like the final object structured ideally:
(CODE)
Can someone help me build this as a valid Javascript Object / Json Object please?

Help creating product object

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

JavaScript Object Notation, or JSON, is human-readable text used when transmitting data objects consisting of attribute:value pairs between a server and a web application as an alternative to XML. JSON, while it is originally derived from JavaScript, is a language-independent data format. Code for parsing and generating JSON data is available in many programming languages.