{
  "manageEntity": {
    "action": "Save",
    "entityId": "505413802",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd786ff3bfa940f0e28d821c3a6aa688ae877c8e37e6adfbff9be1c0b3578d9ee",
    "signature": "0xe657485d19725faf47d21880739adb1d6b33e714e57fbf69b8aaac3afdce59727661a2a507dc43a702075824ba282bcd5c78fcc1ec814ba56efcc2cddf73d42c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}