Request received:

{"device":null,"cats":null,"client":null}

Expected Success Result:

<?xml version="1.0"?>
<response>
  <error>false</error>
  <message>success message</message>
  <display>0</display>
</response>

Expected Failed Result:

<?xml version="1.0"?>
<response>
  <error>true</error>
  <message>Database Error</message>
  <display>0</display>
</response>

Documentation:

ParameterDescription
devicethe device id which should be a unique identifier of the phone
(bbPIN for blackberry)
catscategories to subscribe to
accepted values: comma-separated categories ids
clientphone type
accepted values: {iphone, android, blackberry ...}