{
  "manageEntity": {
    "action": "Save",
    "entityId": "1819350947",
    "entityType": "Track",
    "nonce": "0xb7d1ff963f86852416670cf06444aad502002f98e7293bbfbf67ccd0dacc807f",
    "signature": "0xbddada411adef2f41a52c360bf07714814f856135246acec2f6d592830b605a86e3b4b070656d0e50cff6611e26f38ce08fd6735c56d10e442479929f9b622841b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}