{
  "manageEntity": {
    "action": "Update",
    "entityId": "666831582",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierawc75hfbvibjug6yc6nup5e6stecl5hpm3tdzydibdpxnwki5aeoq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":155062730},{\"type\":\"playlist\",\"playlist_id\":1870221916},{\"type\":\"playlist\",\"playlist_id\":442825962}]}}}",
    "nonce": "0x221c8f056cdccf1b735911abbfd1549c54e5afb1651c55de10c07ad8fa869b9e",
    "signature": "0x2e652764480ea50dd1f9796c147ac557948a24e547cd79c8aaa195acba61dfb67e7a0f9ae7e6b84758e3d450a53c12809838ce8c92239552caf5ca46927c23471c",
    "signer": "0x74a8042b1A78054598367dDc4E60093981207384",
    "userId": "666831582"
  }
}