Convert entity data into Json format for calling REST API

Hi, I need to map the entity that has the data into Json format which would be used for calling the Rest API. Followed this link but still needs more details about mapping and data conversion.    
1 answers

you can try this;

1 – create in mendix modeler a json structure by pasting in full json request/response;

2 – create an import/export mapping based on the json structure

3 – do your REST call and set up your request/response settings in it, wherein you can specify on basis of which import/export mapping it can be parsed