Predefined Blocks
predefinedBlocks is referring to the blocks to be shown once the user enter the LivePage.
Any attributes listed in experience.json file overwrites those in template.json.
Note: The attributes are not compulsory to be stated in experience.json. If certain attributes do not exist, template.json template will be used instead.

The example above shows that page title, fireside chat, join speakers and augmented reality have been predefined in defaultLivePages.
The data field is the individual components inside each LivePage block.

For each of the data field, you may get the details by referring to the table of content below.