{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa163f0deac209309ab9b894f9f4d87286b60ce7d7ca14c751bf8121fdfac4801",
    "signature": "0x6935b0ae7b15b86f4a0fae22c95c396b26279f0f882a1f4982cf3bc83b8be570141170abc04903fdaf2127ee56a6f24cd92c40ed897ca8b2e74722bb6a39f7231b",
    "signer": "0xbF669258885CD7708e9d4a3C398b6b84803fF852",
    "userId": "346046178"
  }
}