List all tournaments or create a new tournament.

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HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "time_start": "2016-03-31T21:52:00Z",
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            "analysis_enabled": true,
            "exclusivity": "open",
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            "ended": "2016-08-12T20:14:21.680375Z",
            "start_waiting": "2016-03-31T21:52:21.182806Z",
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}