Previous value: -nullNew value: +{
+  "properties": {
+    "received_email": {
+      "properties": {
+        "attachment_count": {
+          "type": "number"
+        },
+        "attachments": {
+          "items": {
+            "properties": {
+              "content_id": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "content_type": {
+                "type": "string"
+              },
+              "data": {
+                "description": "Base64 content, when included",
+                "type": "string"
+              },
+              "filename": {
+                "type": "string"
+              },
+              "size": {
+                "description": "Bytes",
+                "type": "number"
+              }
+            },
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "auto_submitted": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "bounced": {
+          "type": "boolean"
+        },
+        "cc": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "created_at": {
+          "description": "ISO 8601",
+          "type": "string"
+        },
+        "domain_id": {
+          "type": "string"
+        },
+        "domain_name": {
+          "type": "string"
+        },
+        "from": {
+          "type": "string"
+        },
+        "html_body": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "id": {
+          "description": "Received email id",
+          "type": "string"
+        },
+        "in_reply_to": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "mail_from": {
+          "description": "Envelope sender",
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "message_id": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "rcpt_to": {
+          "description": "Address it was delivered to",
+          "type": "string"
+        },
+        "received_at": {
+          "description": "ISO 8601",
+          "type": "string"
+        },
+        "received_with_ssl": {
+          "type": [
+            "boolean",
+            "null"
+          ]
+        },
+        "references": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "spam_status": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "status": {
+          "type": "string"
+        },
+        "subject": {
+          "type": "string"
+        },
+        "text_body": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "to": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "id"
+      ],
+      "type": "object"
+    }
+  },
+  "required": [
+    "received_email"
+  ],
+  "type": "object"
+}