curl --location --request POST '/api/v1/subscriptions//subscription-invoices' \
--header 'Authorization: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
"amount": "string",
"description": "string",
"due_date": "2019-08-24T14:15:22.123Z",
"usage_quantity": 0,
"usage_description": "string",
"billing_mode": "FIXED",
"metadata": {}
}'{
"success": true,
"data": {
"uid": "string",
"subscription_id": "string",
"invoice_id": "string",
"amount": "string",
"currency": "string",
"token_address": "string",
"status": "string",
"description": "string",
"due_date": "string",
"paid_at": "string",
"voided_at": "string",
"attempt_count": 0,
"next_payment_attempt": "string",
"processing": true,
"metadata": {},
"created_at": "string",
"updated_at": "string"
}
}