{
  "manageEntity": {
    "action": "Save",
    "entityId": "459122",
    "entityType": "Track",
    "nonce": "0x5c0fde44a22a0fac53ca1b4071b131ce59b10a594366c43a62071e5d1074a033",
    "signature": "0x5efa9bd610ccb4a08a51d7d13268221f66746548cc2029132837f9c10bb4755811ae5038095e1d7fbc86d9f474e3b454ba2b8c1f4a1cfbd6546731c606e694861b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}