Remote storage option is not sending in $_POST the JSON structure

Hi @artf! I'm working to adapt your content builder in our system using the latest release v.0.14.21. I have set up the following configuration of the StorageManager: storageManager: { type: 'remote', stepsBeforeSave: 1, autoload: true, autosave: false, urlStore: '/save', urlLoad: '/load', contentTypeJson: true },

With contentTypeJson = true I can load the content correctly from load action. Also I created a new button to save the content manually using the call "editor.store()". The problem comes up now in the action save I never receive in $_POST the json structure with HTML, COMPONENTS, ASSETS, ... If I switch off the parameter contentTypeJson: false then I'm able to receive the json structure in $_POST but the data is not loading properly. So I don't now exactly if you can support me. I've just read all the issues closes and I don't find the correct solution.

Thanks in advance.