{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462644783",
    "entityType": "Track",
    "nonce": "0xdab70106cb4efb0e17aebcf397127f9d6c01a57a4c92e567221219e330f7cbad",
    "signature": "0xc64273e9e8e01e93f3ed9ba23b2a0605e2b24ee2f54a77f2565575263436dc770cdadd96aa63accbd07e77b4ed0770c9e9a03a446c8b8a1b69fc0ad3bc5bea761b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}