{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x90d3db50e7ada12641db0ee6478a69c364e44a8b7d25389f587e5963246e7d26",
    "signature": "0x5ffc6e128fca845623d43b29f9be15eed64bc6845d3decb555b511f9e35f72d97c0f5e3815a2a88d6dc843c2250957e305a5ca9fb4810f340c06ed007b2fb27a1c",
    "signer": "0x31eba27Ca105bABB3B8590b9A71b07C6d1e7c747",
    "userId": "406716751"
  }
}