apoc.convert.setJsonProperty
Procedure

Details
Syntax	`apoc.convert.setJsonProperty(node, key, value)`
Description	Serializes the given JSON object and sets it as a property on the given `NODE`.
Input arguments	Name	Type	Description
	`node`	`NODE`	The node to set the JSON property on.
	`key`	`STRING`	The name of the property to set.
	`value`	`ANY`	The property to serialize as a JSON object.

Usage examples

The examples in this section are based on the following sample graph:

CREATE (:Person {json:'{a:[1,2,3]}'});

MATCH (p:Person)
CALL apoc.convert.setJsonProperty(p, 'json', {a: [4,5,6]})
RETURN p

Results
p
(:Person {json: "{\"a\":[4,5,6]}"})

We can extract the JSON value from the node using apoc.convert.getJsonPropertyMap:

MATCH (p:Person)
RETURN apoc.convert.getJsonPropertyMap(p, "json") AS map;

Results
map
{a: [4, 5, 6]}