{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbc8fafa1c78b08a86328563cac3add703cdcf00ee4f6128f1f867d31152c0f68",
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    "signer": "0x09CD5801E4DE8958d8d5976C98AEd9219260261a",
    "userId": "172398120"
  }
}