Request Mandate for companies

{ "companyNumber": 10013032 }

{ "status": 201, "message": "Successfully created mandate" }

{ "status": 404, "error": "The company number you entered does not exist" }

{ "status": 409, "error": "There is already an open mandate request for the specified company number. Please contact the company." }

{ "status": 500, "error": "Internal server error" }