/api/products/{product_id}/items/{item_number}/comments.json

comments.json

{
    "body": "These mockups look amazing. However, I think we should make the running guy glow when the AJAX queries are running instead of the 'Working...' header we have.",
    "type": "comment",
    "id": 445,
    "created_by": {
        "first_name": "Joe",
        "last_name": "Stump",
        "id": 1,
        "email": "joe@joestump.net"
    }
}