curl --request PUT \
  --url https://api-{dc}.moengage.com/v2/custom-segments/file-segment/add-users \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "name": "custom_segment_unique_name",
  "cs_id": "<unique cs id>",
  "attribute_name": "unique_identifier",
  "attribute_type": "string",
  "file_url": "https://s3.amazonaws.com/Sample_GAIDs_add.csv",
  "callback_url": "http://example.com/moengage-callback",
  "emails": [
    "user1@example.com"
  ]
}
'

{
  "message": "File-segment user-add request accepted",
  "success": true,
  "cs_name": "custom_segment_unique_name",
  "cs_id": "<unique cs id>"
}

{
  "title": "Invalid Request",
  "description": "<message>"
}

{
  "title": "Authentication required",
  "description": "<message>"
}

{
  "title": "Entity Not Found",
  "description": "Segment not found with the given name: <custom_segment_unique_name>"
}

{
  "title": "Too Many Requests",
  "description": "<appropriate message>"
}

{
  "title": "Internal Server Error"
}