{
  "manageEntity": {
    "action": "Update",
    "entityId": "753406205",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraq3o7icrzflvjjyd5kaae7xbyu24jkimil37khdfya6tgrwrtr56q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":59672028}]}}}",
    "nonce": "0x1b18b61c966b5c2098e13e7cf891a0969a72bf5df9069d0912b97a86cfa5966b",
    "signature": "0x351f225126390a7b4bd41581b194c5058bff8eaaf2fdb3f13b74bf13237e95fe262312eef6d650b4e3fa2208cb545a33033aa4631f2363863c123485dffc54691b",
    "signer": "0xA78Fd746fAA824dCb68b68CC13fA9812a1ff2069",
    "userId": "753406205"
  }
}