I am getting error while integrating upload document api

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"
}'



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