Creating relationships between nodes using Spring Data Rest and neo4j - neo4j

Question

I am starting to use Neo4J with Spring Data Rest. I have a node entity and a relationship entity for modelling nodes and edges. I'm able to create new nodes with the following using postman.
POST http://localhost:8080/nodes
{
"name" : "Test"
}
I am unsure of what the JSON format would be to create relationships between the nodes. For example:
Create a new node and relate to an existing node
Create a relationship between two existing nodes.
Any examples on what JSON I need to use would be very much appreciated.
My node entity and relationship entity are as follows:
#NodeEntity
public class Node {
#Id
#GeneratedValue
private Long id;
private String name;
private int count;
#Relationship(type = Edge.TYPE, direction = Relationship.UNDIRECTED)
private Set<Edge> edges = new HashSet<>();
public void addEdge(Node target, int count) {
this.edges.add(new Edge(this, target, count));
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Set<Edge> getEdges() {
return edges;
}
public void setEdges(Set<Edge> edges) {
this.edges = edges;
}
}
#RelationshipEntity(type = Edge.TYPE)
public class Edge {
public static final String TYPE = "LINKED_TO";
#Id
#GeneratedValue
private Long relationshipId;
#StartNode
private Node start;
#EndNode
private Node end;
private int count;
public Edge() {
super();
}
public Edge(Node start, Node end, int count) {
this.start = start;
this.end = end;
this.count = count;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
public Node getStart() {
return start;
}
public void setStart(Node start) {
this.start = start;
}
public Node getEnd() {
return end;
}
public void setEnd(Node end) {
this.end = end;
}
public Long getRelationshipId() {
return relationshipId;
}
public void setRelationshipId(Long relationshipId) {
this.relationshipId = relationshipId;
}
}

Answer 1

OK I worked it out, you can do this:
PATCH http://localhost:8080/nodes/1
{
"name" : "Test",
"edges": [
{
"start": "http://localhost:8080/nodes/1",
"end": "http://localhost:8080/nodes/2"
}
]
}
This will add the relationships between the nodes.
Hope this helps someone.