{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x36118b1ea06c9b9531ddc768d010c248c1f5d711b3bc7667d4031c8f43bcfa1b",
    "signature": "0x705b4865efefb547faa50fb131cac32460f4360aa90986425fea6effed6eed5257bf6f6565a67fec0c2e6946c798d6c86aa0e29fe251c723d123a8c08466ae011b",
    "signer": "0xf9f42da5842370dCa1b64D718eFB58a7729d0e06",
    "userId": "815933093"
  }
}