{
  "manageEntity": {
    "action": "Update",
    "entityId": "668479312",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierahvnrvsfxe5zf6unjbsoouvqzuwhixykbsseqw4w4jphqwse6pt5a\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1101286144},{\"type\":\"playlist\",\"playlist_id\":503586393}]}}}",
    "nonce": "0x0dc858df5b996a2a95aaa30ca540b06a1c2fffea98cb32ebaec6ae193824e41d",
    "signature": "0xb0eb0d5b7e3f4ba27b89c273967601c4db61e4f9b2e763e6463b359057087df07a82d13b7c4caf8abfdb04e99ca00c0bb37f05dfa76f32de76290077499807861b",
    "signer": "0x85B1B971C5fe67452C1B05674372A79112F62292",
    "userId": "668479312"
  }
}