GeoJSON with timestamps

What would the GeoJSON with timestamps look like? Looking at the [playback part of the user guide](https://github.com/keplergl/kepler.gl/blob/master/docs/user-guides/h-playback.md), it's unclear to be whether your GeoJSON should contain arrays of values and corresponding timestamps for each location? Is the following correct?
```
var statesData = {
"type": "Feature",
"properties": {
"measurement": "Temperature",
"tag: "Alabama",
"tag": "Max",
"field": [100, 102, 103],
"time": [05/20/2020, 05/21/2020, 05/21/2020],
},
"geometry": { "type": "Polygon", "coordinates": [[[-87.359296, 35.00118], ...] } }
};
```
Thank you!

Read docs/user-guides/h-playback.md and inspect how the guide currently describes GeoJSON timestamps. Clarify whether values and timestamps should be arrays, correct the example's timestamp representation, and update the guide with a valid example that answers the reported question.

Written by the indexing model from the issue text.