neo4j: What is the syntax to set cypher query parameters in the browser interface?

In neo4j-browser you need type for example:

:params {nodes: [{name: "John", age: 18}, {name: "Phill", age: 23}]}

Then you can use params as usual:

UNWIND {nodes} as node
MERGE (A:User {name: node.name, age: node.age})
RETURN A

For clear params in neo4j-browser type :params {}.

For additional help type :help params.