@rangan You can use the apoc.convert.toTree to get the associated nodes. Below is the link which might help you.
Neo4j Graph Database Platform
apoc.convert.toTree - APOC Documentation
This section contains reference docum...
If you are exploring Neo4j, please use Neo4j ETL to link your relational database to neo4j and check the graphs formed according to the keys defined on the RDBMS. Below is the link for your reference .
Neo4j Graph Database Platform
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The best solution to parse the complex json data onto neo4j platform is to flatten the data and use apoc to make labels, nodes and relationships and unflatten while retrieving it from neo4j.