Using Powershell to hit a webhook

I'm trying to use powershell (my most competent language) to hit a webook when a server has a new file. i'm getting a resposne to say the message is empty, however... if i use powershell to spit out the json, and use something like postman, it works fine... any tips?

Hello!

I'm trying to build a simple event watcher for one of my Dnd groups on discord, so they can be notified when i upload new materials to our shared server. unfortunately, there appears to be a bug in how discord receives the invoke-restmethod from powershell. anyone here tried this before?

Here's my test code, and the error response

$webHookUrl = "https://discordapp.com/api/webhooks/``XXXXXXXXXXX

$payload = "{""content"": ""Yarr! there's a new file available for $campaign, check it out, ye land lubber!""}"

Invoke-RestMethod -Uri $webHookUrl -Method Post -body $payload

Invoke-RestMethod : {"message": "Cannot send an empty message", "code": 50006}

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