Query the csvimport module via REST API mechanism - Error: "Unsupported attributes type"

What I am trying to do

I've read from the training material related to MISP modules that we can query a module via REST API.
Based on the example query provided on the github to test the DNS module, I would like to query the csvimport module.

The way i do it
By inspecting csvimport.py handler function source code, i've made up a json payload that look like this:

{
	"data": "",
	"config": {
		"header":",ip-dst,ip-dst|port,,datetime,malware-type",
		"has_header": 0, 
		"special_delimiter": ","
	},

	"file": "/var/www/MISP/ipblocklist.csv",
	"module": "csvimport"
}

I request the csvimport by this command: curl -s http://127.0.0.1:6666/query -H "Content-Type: application/json" --data @body7.json -X POST

The problem is that i get stuck into the start of the handler (I don't know what to put in the data field in order to pass the first if else) :

def handler(q=False):
    if q is False:
        return False
    request = json.loads(q)
    if request.get('data'):
        try:
            data = base64.b64decode(request['data']).decode('utf-8')
        except UnicodeDecodeError:
            misperrors['error'] = "Input is not valid UTF-8"
            return misperrors
    else:
        misperrors['error'] = "Unsupported attributes type" <-- Here comes the error 
        return misperrors
        ...

Any Help would be more than welcome

Start with csvimport.py and the linked MISP training material, then compare the module handler with the REST /query example for the DNS module. Determine the expected request data format and document a working csvimport request using the existing body7.json and curl command. Done means the example is clear enough to produce a successful module response.