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Request uri: https://civi.timelab.org/sites/all/modules/civicrm/extern/rest.php?api_key=AZsxdft666E&key=b74fb3d7b6397e00363c9e4b34eff9c1&entity=Timelab&action=getevent&json=%7B%22event_id%22%3A1670%2C%22fetch_participants%22%3Atrue%7D