{
  "manageEntity": {
    "action": "Update",
    "entityId": "399845135",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6986cbae7101f9907f389e5c54ccb96529a98607994676b159aa29d5a2bc9760",
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    "signer": "0x0C4a26388b903fD4825bE9029b68B3cbBa31f84F",
    "userId": "399845135"
  }
}