{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf311712fe7a28e44945b30a11581c06351f9e0d216eb81903c8855022db1a279",
    "signature": "0x9eace15212460736882c15051d1b15cdddac0adc53489f3595cd0f649331938473b6b9e5d69dc01971db1469f7a939d1de88172addbd64bac233fde77766b9a31c",
    "signer": "0x4655f3313c8218Ab2B7384fad47CEcd4FEB5f243",
    "userId": "854821388"
  }
}