{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcc0676893eeb1272b5d8ced630ee7469c6b2c4861f2b17133d9371c54c332a72",
    "signature": "0x930c83ae1e7a489cf8ac20a05fc39b9e0c2e69caf5b907b2cc4e1e12e4a8dda368c6922f3978b4e22353232eb47daea825f865dd2394c7613d11e91f6d16127f1c",
    "signer": "0x8a8629f1e88A2A3399758f4E3FAB1076AfEd54b9",
    "userId": "596978064"
  }
}