Update README.md

Author: github-actions[bot]

README.md

@@ -289,28 +289,29 @@ example:
 
 To improve compatibility with other services Secured Signal API provides aliases for the `message` attribute by default:
 
-| Alias       | Priority |
-| ----------- | -------- |
-| msg         | 100      |
-| content     | 99       |
-| description | 98       |
-| text        | 20       |
-| body        | 15       |
-| summary     | 10       |
-| details     | 9        |
-| payload     | 2        |
-| data        | 1        |
-
-Secured Signal API will use the highest priority Message Alias to extract the correct message from the Request Body.
-
-Message Aliases can be added by setting `MESSAGE_ALIASES`:
+| Alias       | Score |
+| ----------- | ----- |
+| msg         | 100   |
+| content     | 99    |
+| description | 98    |
+| text        | 20    |
+| body        | 15    |
+| summary     | 10    |
+| details     | 9     |
+| payload     | 2     |
+| data        | 1     |
+
+Secured Signal API will pick the best scoring Message Alias (if available) to extract the correct message from the Request Body.
+
+Message Aliases can be added by setting `MESSAGE_ALIASES` to a valid json array containing dictionaries of `alias`, the json key to be used for lookup (use `.` dots for using values from a nested dictionary and `[i]` to get values from an array):
 
 ```yaml
 environment:
   MESSAGE_ALIASES: |
     [
-      { "alias": "note", "priority": 4 }, 
-      { "alias": "test", "priority": 3 }
+      { "alias": "msg", "score": 80 }, 
+      { "alias": "data.message", "score": 79 },
+      { "alias": "array[0].message", "score": 78 },
     ]
 ```