{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4e9cf47bfd505d90e4874967d2e464e90617acc92c753270c3d5374341be7da5",
    "signature": "0x1e4408e4bfa57310d85de246c493f4adb6b312a735430015225db73d46e8606f71986fb14f32412b512817b104f391e1736759f4b8c6dad193d6cef7d758a16f1b",
    "signer": "0xe2C9bf3Ada7DA8e65705b80311C2954ED141b418",
    "userId": "6433031"
  }
}