{
  "manageEntity": {
    "action": "Update",
    "entityId": "577745560",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierafksft7c6clb7qujqk2ygpksrmtwikzmqwxancwgvravkp2ixkeuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":649011190},{\"type\":\"playlist\",\"playlist_id\":748115907}]}}}",
    "nonce": "0x7dc3d057c419eb9419b454cdbe950cc6d1289fcb8604437b6201b2f906d5e3ff",
    "signature": "0xc96d574312d9aae774fa2889fb6d336276562cd82b5fdac65563ea2540d64c1579c077b4bd4b76f1236ce8a95fd203741702a177e225fc997a79296f242acaf91b",
    "signer": "0x569AD4a425B92a964d8e182094f4aC58C0673162",
    "userId": "577745560"
  }
}