{
  "manageEntity": {
    "action": "Save",
    "entityId": "196607078",
    "entityType": "Track",
    "nonce": "0x853ff0989dcddfdc3bd1970df1715adfe74109bd74b9cca3e1cc253f910d40be",
    "signature": "0x46230ca93448b26e7750233a4f3149c9092125b6760fc04154abc252e723d385222674cd68330cc12a1b751c8f3e70865410f440f72a1b6e4bb9b5ae8911d4251b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}