GetOrders Pagination error: InvalidInput

[hetkpatel]

Able to fetch the first 100 orders when running /orders/v0/orders. However, I receive the following error when I try to use the NextToken param to fetch the next pagination of orders:

{
"errors": [
      {
        "code": "InvalidInput",
        "message": "We could not decode your NextToken. Possible reasons include: a transmission error, improper quoting or a truncation problem.",
        "details": ""
      }
    ]
}

Here is the GET request I am using to get the next set of orders:

auth = AWS4Auth(AccessKeyId, SecretAccessKey, 'us-east-1', 'execute-api', session_token=SessionToken)
headers = {'content-type': 'application/x-www-form-urlencoded','Accept': 'application/json','x-amz-access-token':access_token}
params = {'MarketplaceIds': marketplaceId, 'NextToken': 'J3%2FldqIwXEKaJqJYLDm0ZAmQaz......YSMji4wF0IiRkRQPq0Hy%2BPFdKaQ%3D%3D'}

ordersResponse = requests.get("https://sellingpartnerapi-na.amazon.com/orders/v0/orders", params=params, headers=headers, auth=auth)

I have read other issue regarding NextToken + GetOrders and have tried the following:

• Changed content-type from application/json to application/x-www-form-urlencoded in the header
• Used encodeuricomponent() to encode the NextToken before adding it to the params list