{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa8b7fbc3743bcc2a9dcb8f83347921a4e267900387fede75700d265a4840d14f",
    "signature": "0xe9a1f8ed7bf518b294e5acbc55a292e2ffb9180fe533d4c0458475fb3e6148cd3a579460b97b43437b17c701c8fc0889db3bf0cd61a7122cbab87aa2ddfc05681b",
    "signer": "0x214e2bE117D01A083551c7772c904EcE2AE28179",
    "userId": "788132806"
  }
}