{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8aaeb2da8062ab935b1caf29b452a6fa7153f609ad7c8ef253640db946162d87",
    "signature": "0xb6b8ff8c777f5159696808444d57144b4249776d1ca5a47068dff76b6aaa7da20d5fbf69846e57d2197cc23984cc5195871793bbbe00357db9eacb133e77207d1c",
    "signer": "0x71f45CfaFF116349C2665aede07Ad32cD5470727",
    "userId": "630838127"
  }
}