{
  "manageEntity": {
    "action": "Update",
    "entityId": "300772943",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd2d6a7dade3cd05d7f62f0285289cbe98511dbee96c35d2dd51c8566ff04b50a",
    "signature": "0xc76c73a55aff5f933d04e913979ef753d7592c6950f2c25a04ba7e72a45b8ce84c3f96b25c3b8de8a4d9584e5b5129b282b51d4c120f8754ab551c0eb5f387a11c",
    "signer": "0x7e4D74Cbfc2DEDf8e5197595ee593e6CDe3C9F46",
    "userId": "300772943"
  }
}