{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ba7ced7a7eabef46a39f782881fdbbc9f2bd61ede244921d31c9881ee3159a7",
    "signature": "0xcec97b7654f148989e3054166584b2235c92ccbff26ee4d6cd75cae7b9928e8e12ddc2dd354fed4b3e622cafb004884cc6976cb4911100fa946380a5338652ae1c",
    "signer": "0xe690f07dB9A4F131d24D81555B655d9d970abFEC",
    "userId": "533238558"
  }
}