{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb039ff8a3cc9cb9f70e1eea26e5b2539e47f2e877a6ce93cf95dd20b98fafca6",
    "signature": "0x911c09f739e5cb976543a3b641fe29f8ad3d8eacdf0915c53223f8dae3ccea9c668467287e16e87e52258e279a1d1f9eb1ae60686dd4b25cb18ef66225ec340b1b",
    "signer": "0xaD18d47Fa572f5b5Ad74227EAA7B239318402Ce8",
    "userId": "176359011"
  }
}