Fix some typo and correct expected return types

[MustafaJafar]

Is there an existing issue for this?

• I have searched the existing issues and added correct labels.

Description

Current Behavior

Issue mentioned here #200 (comment)

Expected Behavior

it should work fine

Steps To Reproduce:

1. create model
2. change frame range
3. publish

Additional context:

Version

Version of the server, ayon-core and the addon that's affected

What platform were you running when you found the bug?

Windows

You can also provide any additional information relevant to the issue.

Relevant log output: