Web API Put Gotcha

DoesntWork.cs

[HttpPut]
public async Task<RestResponseModel<Company>> Put([FromUri] int companyId, Company company)
{
  var response = new RestResponseModel<Company>();
  try
  {
    company.LastModifiedOn = DateTime.UtcNow;
    company.ModifiedBy = Guid.Parse(this.UserAspId);
    response.Data.Add(await this.dataAccess.UpdateCompany(id, company));
  }
  catch (Exception exception)
  {
    logger.Error(exception);
    response.ErrorsAdd(exception);
  }

  return response;
}

dotnetcoreway.cs

[HttpPut("{id}")]
public string Put([FromRoute] int id, [FromBody] object company)
{
    return id + " was the parameter.";
}

Works.cs

[HttpPut]
public async Task<RestResponseModel<Company>> Put([FromUri] int id, Company company)
{
  var response = new RestResponseModel<Company>();
  try
  {
    company.LastModifiedOn = DateTime.UtcNow;
    company.ModifiedBy = Guid.Parse(this.UserAspId);
    response.Data.Add(await this.dataAccess.UpdateCompany(id, company));
  }
  catch (Exception exception)
  {
    logger.Error(exception);
    response.ErrorsAdd(exception);
  }

  return response;
}