{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0c5b85fb02004a8b7112eb314d2724766e23cb6a1b42a50a15c96ed5a80a8c23",
    "signature": "0x45f2a70c46d7b0000f613e0f197a90b4d9f826a9bc0e7017523482910f0d6be851dd157b6d5d8d175f371477ec4ebdffa95907cf84ad1ea44629c3098fc306d81c",
    "signer": "0xFa2d4C2518C0BB689b437d226912F37Cd9d98A23",
    "userId": "61154"
  }
}