{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6a2ceb22e4a618d01eb8a53f4c6efbe02ec85299d999efc237de59e84c3e28f8",
    "signature": "0xc6cb9367b87c7398dbeb3c883105e6c919a06c22630da0a963d6b3159913db52058b4eea055996f6d55e6d6b881328c01fc051e9a91a77b66a63fd7e846984f21c",
    "signer": "0x6F49372c9713298328De87d3376cEf1020FA192D",
    "userId": "632195573"
  }
}