{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ac5f9f0b20258566965020bae657ad41d4e096d93cf1ce701d9f1df37e2b75e",
    "signature": "0x65852f3b4eb6a733acc6236c90705797007a6e2cd04bcc63a356b2693423d25e278daf7f6faa46206e4125386b06cfe953337bad354f67d201af3bfb52eb8c2d1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}