How can I fill value field?

_This might be a duplicate of https://github.com/evollu/react-native-firebase-analytics/issues/18_

I believe I am doing this right. I am trying to log all my redux actions like this:

```
function analytics (state = 0, action = {}) {
const { type, ...rest } = action
// ignore all the following events for analytics
switch (type) {
case types.__INIT__:
case types.REHYDRATE:
case types.router.PUSH:
case types.router.REFRESH:
return state
// by default, log everything possible
default:
Analytics.logEvent(type, {'action': JSON.stringify(rest)})
return true
}
}
```

But this is how they end up on firebase:

How can I fill the `value` field?