Task: Create, update, and get a post in Ghost

n8n workflow JSON:
{"id":"170","name":"Create, update, and get a post in Ghost","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[310,300],"parameters":{},"typeVersion":1},{"name":"Ghost","type":"n8n-nodes-base.ghost","position":[510,300],"parameters":{"title":"Running ghost with n8n!","source":"adminApi","content":"<p>In this article, you will learn how to automate your Ghost site with n8n!</p>","operation":"create","additionalFields":{}},"credentials":{"ghostAdminApi":"Ghost Admin API"},"typeVersion":1},{"name":"Ghost1","type":"n8n-nodes-base.ghost","position":[710,300],"parameters":{"postId":"={{$node[\"Ghost\"].json[\"id\"]}}","source":"adminApi","operation":"update","updateFields":{"status":"published"}},"credentials":{"ghostAdminApi":"Ghost Admin API"},"typeVersion":1},{"name":"Ghost2","type":"n8n-nodes-base.ghost","position":[910,300],"parameters":{"by":"id","source":"adminApi","options":{},"identifier":"={{$node[\"Ghost\"].json[\"id\"]}}"},"credentials":{"ghostAdminApi":"Ghost Admin API"},"typeVersion":1}],"active":false,"settings":{},"connections":{"Ghost":{"main":[[{"node":"Ghost1","type":"main","index":0}]]},"Ghost1":{"main":[[{"node":"Ghost2","type":"main","index":0}]]},"On clicking 'execute'":{"main":[[{"node":"Ghost","type":"main","index":0}]]}}}