{
  "manageEntity": {
    "action": "Save",
    "entityId": "544522",
    "entityType": "Track",
    "nonce": "0xf016a79d191e228b77d06619de0190eba3b60439247da86935a24057da67a684",
    "signature": "0x2aad9588735ca7b89efcb41ffa116d1bbc52afaf042d41e2d92ee694686a131b7a2f8ce6a6c8d22a9ed757d49738ac2c366ff570e94b2e52f04ef2f4b0f066731c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}