Task: Onboarding tutorial part 3

n8n workflow:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Customer Datastore","type":"n8n-nodes-base.n8nTrainingCustomerDatastore","position":[450,300],"parameters":{},"typeVersion":1},{"name":"Customer Messenger","type":"n8n-nodes-base.n8nTrainingCustomeMessenger","position":[650,300],"parameters":{"message":"=Hello from n8n, {{$node[\"Customer Datastore\"].json[\"name\"]}}","customerId":"={{$node[\"Customer Datastore\"].json[\"id\"]}}"},"typeVersion":1}],"connections":{"Customer Datastore":{"main":[[{"node":"Customer Messenger","type":"main","index":0}]]},"On clicking 'execute'":{"main":[[{"node":"Customer Datastore","type":"main","index":0}]]}}}