Full documentation can be found here
Here is a Sample of the "Append" api
}
"username": "[username]",
"passtoken": "[passtoken]",
"action": "append",
"templateId": "[template_id]",
"csvData": "False",
"data": {
"id": "[id]",
"name": "[name]",
"mobile": "[mobile]",
"phone": "[phone]",
"email": "[email]"
}
}