{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf4c6d49c93ea7e426213baffb0220a9a182aac4e91a2e5c931a5f0295021a5ae",
    "signature": "0x5be9b1084b8cb19b187ca04e7fd64f200db7629211e6cf979992c995690854d117fb1941f3a386dc8de86b2516f6c41bcc7b1507930e22905769a7f0382694531b",
    "signer": "0x0319D614D59F18154d648c7A48469504C3690FdE",
    "userId": "852879658"
  }
}