Troubles sending information through webservice.

Hello everyone. I've been working on an integrating BPM to one of our products. Currently I'm having an issue: when sending the data through a JSON for the webservice, I'm having this error:

{

    "responseStatus": {

        "ErrorCode": "NotSupportedException",

        "Message": "SchemaColumn",

        "Errors": []

    },

    "rowsAffected": -1,

    "nextPrcElReady": false,

    "success": false

}

I would like to know if I'm not pointing to the correct schema, to a field that it does not posses or what could be the issue. 

This part of the service should create a new case, if someone could help me providing a sample, or any other documentation to follow up, it would be great. 

Regards,