I am getting error while integrating upload document api

This is the error code
{
    "code": 9008,
    "error_param": "requests",
    "message": "requests occurs less than minimum occurance of 1",
    "status": "failure"
}
This is the data i am passing in data field{
        "request_type_id": "2000000322040",
        "request_name": "NDA",
        "actions": [
            {
                "recipient_name": "Sfghgh",
                "recipient_email": "binoykunalswain@gmail.com",
                "action_type": "SIGN",
                "private_notes": "Please get back to us for further queries",
                "signing_order": 0,
                "verify_recipient": true,
                "verification_type": "EMAIL",
                "verification_code": ""
            }
        ],
        "expiration_days": 1,
        "is_sequential": true,
        "email_reminders": true,
        "reminder_period": 8,
        "folder_id": "2000000489161"
    }'