Is this possible?

Yes its possible, but the way you are sending it is not correct.

The meaning of <MyJsx commonProps /> is:

<MyJsx commonProps={true} />

So if you don't specify any value, by default it will take true. To pass the object, you need to write it like this:

const commonProps = {myProp1: 'prop1',myProp2: 'prop2'};
<MyJsx commonProps={commonProps} />

Update:

If you have an object and want to pass all the properties as separate prop, write it like this:

<MyJsx {...commonProps} />

You can use the spread operator to do this.

You can simply do <MyJsx {...commonProps} />

Now what all individual properties you have in commonProps will be sent as individual props to MyJsx.

You need to use double braces, like this:

messages={{tile:'Message 1'}}

Or to pass many objects:

messages={[{title:'Message 1', name: 'Andrew'}, {title:'Message 2', name: 'Greg'}]}

It's simply JS syntax inside braces.

A final component might look like this

<Chat title="Some str" messages={[{title:'Message 1', name: 'Andrew'}, {title:'Message 2', name: 'Greg'}]} />