Power automate custom connector to BOX Upload API

Hello,

I am running into an issue creating a custom connector that will upload a pdf file to box folder.  I am configuring the custom connector with the BOX Upload API.  I have postman setup properly to upload file but when I import them to custom connector it does not configure properly. It returns a 400, "API upload did not contain a file part"  The raw request body is below.  There seems to be some syntax issue perhaps?  If anybody here has building a customer PA connector and can share your insights please do share!

David.

{
"host": {
"connectionReferenceName": "shared_box-20upload--",
"operationId": "Uploadfile"
},
"parameters": {
"Content-Type": "multipart/form-data;boundary=WebKitFormBoundary7MA4YWxkTrZu0gW",
"body/$multipart": [
{
"headers/Content-Disposition": "form-data; name=\"attributes\"",
"value": "{\n \"name\": \"test11.pdf\",\n \"parent\": {\n \"id\": \"142982795411\"\n }\n}"
},
{
"headers/Content-Disposition": "form-data; name=\"file\", filename=\"\"",
"value": {
"@odata.type": "#microsoft.graph.fileAttachment",
"id": "AAMkADExNjVhMzg0LWQyMTEtNDNkYi05YWE3LTYwMDk1OGE1YTJmYQBGAAAAAAAbdnwb3G2yR7Pj0aWJn6DTBwBfi9w1M-rwRqySYi6aOKx_AAUvV8t_AABfi9w1M-rwRqySYi6aOKx_AAUzpl0KAAABEgAQACiSHdJ6iRlHqkaX5_xdF3k=",
"lastModifiedDateTime": "2021-12-01T20:58:43+00:00",
"name": "Order_7357678#en-US_Ordered_PacificStandardTime.pdf",
"contentType": "application/pdf",
"size": 102452,
"isInline": false,
"contentBytes": "JVBERi0xLjQ-----etc"
}
}
]
}
}