Authorization failed due to insufficient permissions

[kavishatalsania]

I am calling paypal tracking api and I am getting "NOT_AUTHORIZED" error.

{

"errors": [

{

"name": "NOT_AUTHORIZED",

"message": "Authorization failed due to insufficient permissions",

"debug_id": "5be67c8fa714c",

"details": [

{

"location": "body"

}

]

}

]

}

Which permission I need to call paypal tracking api???