{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcc014493d5f9bf46b56e7be36ed576ba7ab475a25fa3497ab9002fd0a26e5974",
    "signature": "0xd419c6363cda6ae4df63db25c2f085c41ca5521091f9f3f59aef912cc32b6a147121d7bd3d976fd4add55d37984ef35348e3188c35853515d1dc877c92ebb3c41c",
    "signer": "0x552462F88317e9e6E53695Dc39DF4901dB608f78",
    "userId": "511866195"
  }
}