{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00833a5912d36119db9732944797a30013d59b54529e556080734dabec4e7522",
    "signature": "0x5567929961f825f6a10e4fbb69b40b5df90fcc05be11b062349e90546d14a0f8775eb907b04270d8e31404999ace2483ef88ba308da2e6a99e7110a05f746f3c1c",
    "signer": "0x72A970bc57b8313FC276e6d243773b81Ea816D8F",
    "userId": "92402397"
  }
}