{
  "manageEntity": {
    "action": "Save",
    "entityId": "167775",
    "entityType": "Track",
    "nonce": "0x82f21e94725e5536ccf15cae5cb5ec8c46d4f50c6209a34a788397a2027da88d",
    "signature": "0x6636d88170ac999152ec2be89ec21b144ba7fe1f61ffd9847f3957d57a24b9d54e8be1549f910e701d86612c6e9a76b47cf1514aae077bd8d548d7b6e78384a91b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}