{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x49321c79ffffa28b4db14f337e064839c43444be2d73c73d827b42763aeefb8d",
    "signature": "0xadf70c384a5ecf666f78df0a033002c7132f29a53afe5f27f6c46892fb83ad72632f28737a7780d42bb3046d0f4a55aaf96c965658d7a3ae21d8bdfd330a32ab1b",
    "signer": "0x64A87DD582aE730Ab32B930B93c13612Fc496891",
    "userId": "425911249"
  }
}