JSON Syntax Error

Hi everyone, I'm trying to create an Azure Express Route connection and when I try to send my POST request body:

{
    "primaryName": "TestName-PRI",
    "primaryPortUUID": "abcdefghijklmonopqrustuvwxyz",
    "primaryVlanSTag": 511,
    "profileUUID": "abcdefghijklmonopqrustuvwxyz",
    "authorizationKey": "abcdefghijklmonopqrustuvwxyz",
    "speed": 100,
    "speedUnit": "MB",
    "notifications": "abcdefghijklmonopqrustuvwxyz",
    "sellerRegion": "ADAD",
    "sellerMetroCode": "xx",
    "secondaryName": "TestName-SEC",
    "secondaryPortUUID": "abcdefghijklmonopqrustuvwxyz",
    "secondaryVlanSTag": 511,
    "namedTag": "Microsoft",
    "primaryZSideVlanCTag": "###",
    "secondaryZSideVlanCTag": "###"
}

Obviously I will not post content with real data from my company so I filled it in with dummy data.

I keep getting back the following error:

[
    {
        "errorCode": "IC-LAYER2-401",
        "errorMessage": "Json syntax error,Please check request body",
        "moreInfo": "Please refer the contracts for correct fields",
        "property": ""
    }
]

Am I missing something in the request body?