MultiDictProxy inside JSON

Development
1

Via a webhook I do receive the bellow data:
<MultiDictProxy(’{“data”:{“content-available”:“1”,“message”:“Test”,"messageData{“MsgID”:“98046262”,“Control”:“H”},“notId”:“983452”}’:
‘’)>

It looks like a kind of nested JSON.

How can I extract this data?

2

The http header should contain application/json:

-H “Content-Type: application/json”

Then HA does process it as json.