{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6d754d234837e252a38c902d73cb5aa6cd01e22d8cc1937104a744392c31c253",
    "signature": "0x95dce9cda7dcb134763cc18bf905f1ce343fca2f9cd6b60f21f40ab4dfb8661f0543c81907a0ac423f74e6c1d40e26b8dbbe0d587ec8401ba7540d9ea50ba3dd1c",
    "signer": "0x5E9e335B926f13fCfB757dd03233B4f682DDb6d8",
    "userId": "499867732"
  }
}