{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xae07ca8628f0a8ae0d55be6d48104632df862f66ccbb8704d00a33aec9f126bd",
    "signature": "0x5aeee9b0a28039844fff3916601a4cb1490796b5095165a599812c9b81c12f6446339c538d37ab2ab29f7db3278bb9d5ff16df0d9718e7133ac1d38edcbd26c21b",
    "signer": "0x6c85548A20F07181fe5Baa6DA1FDDEC808971362",
    "userId": "190983722"
  }
}