Primitive Array possible?

I need to create a primitive array - one where the array values have no field name - as this would be redundant and add too much data to the system. If someone knows how to do this - I’m interested in suggestions.
{
“records”: [
{
“name_”: “North American Pricing”,
“timeZone_”: “Universal”,
“numDates_”: 3,
“dates_”: [
{
20160101,
20160102,
20160103
}
]
}
]
}