How we can store the json object and received it

Cumulocity has a very flexible data model.

There are various ways to store and retrieve data based on types and usage of data.

You can find more details in below article:

https://techcommunity.cumulocity.com/t/best-practices-and-patterns-for-using-non-iot-data-in-cumulocity/2807

You can store and retrieve data using client library in your cumulocity application.

Pls refer: https://cumulocity.com/guides/web/libraries/#client