{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf09aa8a14797f8a99f979f70dd7f7ca8b18a263340dd0a96769c0b1bf088f935",
    "signature": "0x0a157b998d05f8a92ee5e3c67fa059d2a2e6917f5c4fd496b59813527e8d77eb1510f73abd7ab25329f365d62dc815ecf16d8a90671b79a0aac96498e0d943c91b",
    "signer": "0xcE1000874CF7A0a7b16c35A55F7D6f10C607A868",
    "userId": "442277469"
  }
}