List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-players_start&page=438
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "We put a plus sign \"+\" necessarily! This is a confirmation of your participation!",
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                "summary": "Здесь я провожу разные турниры, рад новым участникам.",
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