{
  "manageEntity": {
    "action": "Save",
    "entityId": "392161583",
    "entityType": "Track",
    "nonce": "0xf83be8561d9c3491650066ffec89d22d6f63dc96fd571cea989ff340857b1e75",
    "signature": "0xe4f01fec42bf5ad62a6cdc1acdf12454cc054c94f83f333e9aaf1b7a5fffd8580634819d6df110e0b97a3c7de3e267563fab8537c7e63df146394ad93a04559e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}