{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1359a9f39328d4e8a0c60d177363bdaf1573be719d722c7b4471202dc326ec0c",
    "signature": "0xeb97d3206245da6a68cc535ace9c27689e2d21fd0cf49690891602aabe2dc9f755246dcb155b3cf16afb23d54b1bba2ac30aceef559ca168b3ce9adaa03fe2931b",
    "signer": "0x031a7407ccAe9d79dbeaEa139109F0224F0bd747",
    "userId": "361844768"
  }
}