Assign sub object of event as prop in agent options?

[Bootta11]

Hi,

Is there way to assign sub object of event to options prop? For example:
// event
{
"eventSubObj": {
"key1": "value1"
}
}

// PostAgent options
{
"url": "http://www.somesite.com/url",
...
"payload": { eventSubObj }
...
}

// so that options translates to

{
"url": "http://www.somesite.com/url",
...
"payload": {
"key1": "value1"
}
...
}

[knu]

You could say "payload": "{{ eventSubObj | as_object }}", I guess.

[Bootta11]

Its not working, i got error: " if provided, payload must be a hash or an array".