LINQ to JSON Upsert

SaveLocation.cs

public async Task SaveLocation(JObject locationJObject, int locationId)
{
    await Task.Run(() =>
    {
        var companyJObject = JObject.Parse(RawJson.Company);

        companyJObject[nameof(Company.Locations)]?
            .FirstOrDefault(x => (decimal)x[nameof(Location.Id)] == locationId)
            .Replace(locationJObject);
    });
}