Dictionary<Object, Object> d = (Dictionary<Object, Object>) m;
solved for now the current status is as follows: (I'm okay)
CLIENT (B4X) -> Send an object dbcomand (bytes)
SERVER - WEB API (C #) -> It receives the call and the object. Read the object (b4xserializator).
SERVER - WEB API (C #) -> makes the sql requests or other activities.
SERVER - WEB API (C #) -> Send the answer to the client in JSON format. if sql with results.
CLIENT (B4X) -> Receives the response and displays the results.