{
  "manageEntity": {
    "action": "Update",
    "entityId": "321193209",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xca225c455e737576541964abdf2f0513a735ed9790453fb7d8b85b9ce4e9e5a0",
    "signature": "0xa7771ad6abc49e21d0559331dcd88c1539850ab272c26f325dd98e815a19b8c604d29a58a660694ddbf47cdb096eaacdf7413d12fd9fc76eaf425af362db5d8c1c",
    "signer": "0x4a3251b59afFa652DE3CD1C6fACAF517bC97c9A8",
    "userId": "321193209"
  }
}