{
  "manageEntity": {
    "action": "Save",
    "entityId": "1112361554",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3a8b8ad5c9412f7eca50a828c75cbbd00b39d1a612480493b365f1c2c805b5cc",
    "signature": "0x33696de56ab7004bda1a2e57681f439a084fc09c145b95e8d7e698f6e2447d90002b5b9bae8da560fc12e6eb5e55a70a97bbc70bf88f6b397a6a39af08428f5d1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}