{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4aea01cfc4aa7f4f24869a66f0c25fd34ad4a7fe14ec3cde13e28257642e7f98",
    "signature": "0x3b57b8b4ff6e1cb326e433a5c550b7681d15bc8af6a6d2fe2d891cb92cd8b934158a52e4622871784a18a9b62839d20afce0b30a936b7ac7ea0d11b3b76153df1b",
    "signer": "0xAf3581E42380be61d394a79FbCBD429Da6bea9ee",
    "userId": "79535688"
  }
}