curl --request POST \
  --url https://api.ngrok.com/vault_secrets \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'ngrok-version: <ngrok-version>' \
  --data '
{
  "vault_id": "<string>",
  "name": "<string>",
  "value": "<string>",
  "metadata": "<string>",
  "description": "<string>"
}
'

{
  "id": "<string>",
  "uri": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>",
  "name": "<string>",
  "description": "<string>",
  "metadata": "<string>",
  "created_by": {
    "id": "<string>",
    "uri": "<string>"
  },
  "last_updated_by": {
    "id": "<string>",
    "uri": "<string>"
  },
  "vault": {
    "id": "<string>",
    "uri": "<string>"
  }
}