Update an entity collection
This method updates the specified entity collection.
Your API key.
You can find your API key on the API Keys page.
The date and time, in RFC 3339 format (“YYYY-MM-DDTHH:mm:ssZ”), when the entity collection was created.
The date and time, in RFC 3339 format (“YYYY-MM-DDTHH:mm:ssZ”), when the entity collection was last updated.