{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6daae3529170370a85417df55329dead655b2f425b7c33481c1d52a25fd524ea",
    "signature": "0xeae23eea4f1af03cda686672a503cbb09125ed70c6a323895766a6d2b4a0b8775d8b8229517c553e57151a4e6ddaae05106584d6b9d034426ad2d6cb132d0a681c",
    "signer": "0xD5e21774eBFbb75367Fae64727C9FC7EB7C6820a",
    "userId": "58273052"
  }
}