{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1c162f1e0c233d47c1a02e042ea44908860cef4fa4a5a6b0e3cd43ec83eac855",
    "signature": "0x9adba3bd9811867ef14dc74604f191bb1f55f36c88e07e0c812bb94fb0e4fa4e710d7e3c676426eba6d2c82ffaf97b4d53cac37f60b203bfa9fb88f4162a45891c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}