{
  "manageEntity": {
    "action": "Save",
    "entityId": "892081250",
    "entityType": "Track",
    "nonce": "0x4613aadb1a914260a4a3bc702dc22f7f1cbf8fa0d1d930bb794868c045c59a3f",
    "signature": "0x341dd18a8eb3cfc66358105bc2fec156f35350ee097febe899f58a59e4be0f0b17a4265c8ba446b76f102913d8d4bbf6207e42eae1b614c41aa5f17297a532141c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}