Error logging an activity

[jlmgomes]

When I try to write a activity via web API, I get the following error: 

{
    "errors": [
        {
            "errorType": "request",
            "fieldName": "n/a",
            "message": "Either \"activityId\" or \"activityName\" should be present"
        }
    ]
}

HTTP Request: https://api.fitbit.com/1/user/-/activities.json

Body: 

{
	"activityId": 90013,
	"manualCalories": 300,
	"startTime": "15:00:00",
	"durationMillis": 1980000,
	"date": "2018-04-09",
	"distance": "5.2"
}