{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x63c15709b5a21fec125b793cd6c94b371693bdb74268b61ef63bc81a9d86fac3",
    "signature": "0x349db6a49b667b31797a81871567488aeb2f23004a53dca9787bf8d0f1fcb6c148eb478e6895662a2dd9871f1a6e831fb03e6ec5c17730afa45c44aa84cc74de1c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}