Attaching a Google Doc to an opportunity

# 1) Create a ContentVersion
ContentVersion = sf_api_call('/services/data/v40.0/sobjects/ContentVersion', method="post", data={
    'Title': 'Important attached document',
    'ContentUrl': 'https://drive.google.com/drive/folders/0B60dm9TFrvQrTDVVYnp3QldvWFE'
})
ContentVersion_id = ContentVersion.get('id')

# 2) Get the ContentDocument id
ContentVersion = sf_api_call('/services/data/v40.0/sobjects/ContentVersion/%s' % ContentVersion_id)
ContentDocument_id = ContentVersion.get('ContentDocumentId')


# 3) Create a ContentDocumentLink
Opportunity_id = "0069E000003o92TQAQ"
ContentDocumentLink = sf_api_call('/services/data/v40.0/sobjects/ContentDocumentLink', method = 'post', data={
        'ContentDocumentId': ContentDocument_id,
        'LinkedEntityId': Opportunity_id,
        'ShareType': 'V'
    })