convertAPI version 2 docx to PDF - coldfusion

Question

I successfully made a connection to version 1 using the below code:
<cfhttp method="post"
url="http://do.convertapi.com/Word2Pdf"
result="convertAttempt"
path="#arguments.path#"
file="#arguments.fileToDestination#"
>
<cfhttpparam type="formfield" name="ApiKey" value="xxxxxxx" >
<cfhttpparam type="file" file="#arguments.path#/#arguments.fileToConvert#" name="File" >
</cfhttp>
Below is the code I am trying to use for version 2. It writes a file to the correct folder, but it's not a readable PDF. I think it has something to do with base64, but not sure. Anyway, hoping there's another ColdFusion user out there to help me out. Then, we hopefully get code samples on the convertAPI site to help others.
<cfhttp method="post"
url="http://v2.convertapi.com/docx/to/pdf?Secret=mysecret"
result="convertAttempt"
path="#arguments.path#"
file="#arguments.fileToDestination#"
>
<cfhttpparam type="file" file="#arguments.path##arguments.fileToConvert#" name="File" >
</cfhttp>

Answer 1

By default ConvertAPI version 2 returns JSON. You need to decode the file using a Base64 decoder.
To save response time and bandwidth, better add the accept=application/octet-stream header to the request, to get an instant binary response without any decoding.

Answer 2

Using the suggestions in the comments and Tomas's answer, here is my final code. It first deserializes the response from JSON. Then decodes the pdf from base64 into binary. Finally, saves the binary pdf file to disk.
<cfhttp method="post" url="http://v2.convertapi.com/docx/to/pdf?Secret=your-secret" result="convertAttempt">
<cfhttpparam type="file" file="#arguments.path##arguments.fileToConvert#" name="File" >
</cfhttp>
<cfset FileResult = deserializeJSON(convertAttempt.FileContent) />
<cfif isDefined("fileResult.Code")>
<!--- Failed --->
<cfelse>
<cfset FileWrite("#arguments.path##arguments.fileToDestination#", BinaryDecode(FileResult.Files[1].FileData, "base64"))>
</cfif>