I'm getting the following error when attempting to create a leaderboard via the documented POST url. Here is the full error response: { errors : [ { id : xxxxxx, status : 400, code : ENTITY_INVALID, title : The request entity is not valid json, detail : The request entity data could not be processed. Please ensure you are sending valid json., meta : { position : { row : 1, column : 1 } } } ] } Except what I'm sending IS valid JSON, emitted directly from JsonUtility and verified via JSONLint: {data:{type:gameCenterLeaderboards,attributes:{defaultFormatter:INTEGER,referenceName:TEST_AUTO,vendorIdentifier:TEST_AUTO,submissionType:MOST_RECENT_SCORE,sortScoreType:DESC,scoreRangeStart:0,scoreRangeEnd:20000,recurrenceStartDate:2025-06-25T13:00:00Z,recurrenceDuration:PT30M,recurrenceRule:FREQ=HOURLY;INTERVAL=1},relationships:{gameCenterDetail:{data:{type:gameCenterDetails,id:xxxxxx}}}}} This follows EXACTLY the pattern in the App Store Connect documentation. I've even tried sending the example JSON they give
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