curl --request POST \
  --url https://backstage.example.com/api/soundcheck/facts \
  --header 'Content-Type: application/json' \
  --data '
{
  "facts": [
    {
      "factRef": {
        "source": "<string>",
        "scope": "<string>",
        "name": "<string>"
      },
      "entityRef": "<string>",
      "data": {},
      "timestamp": "2023-11-07T05:31:56Z"
    }
  ],
  "cache": true
}
'

{
  "facts": [
    {
      "factRef": "<string>",
      "entityRef": "<string>"
    }
  ]
}