{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0f46aa42a837dc598c3b85b53b84ed9cdd190cedfd8dd41cb3a671feeb0385f",
    "signature": "0x236af7036bc9f712d18ebfa6392a3087f30cc16da09a6f1d04c52c68ad474e1514cca5a16619edeb9b334fd6fe4c8b661142aa6f9bf34d68be0a559986d53a131c",
    "signer": "0xFa2d4C2518C0BB689b437d226912F37Cd9d98A23",
    "userId": "61154"
  }
}