{
  "manageEntity": {
    "action": "Save",
    "entityId": "1245574997",
    "entityType": "Track",
    "nonce": "0xdc6d426fb9420165518cb4bbe64ef04fb8d544977cd9af8ca9dd2f29497e7983",
    "signature": "0x9a0b51a7d5380ad845a141f78f0897c547a217c66ec8448576d6244d37a052ee19dfd9d12689199a94e3b32745f901d73359204f9f533a06e01b4e72672755c11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}