{
  "manageEntity": {
    "action": "Save",
    "entityId": "1578788918",
    "entityType": "Track",
    "nonce": "0x2cda3cf52a6af31a8b21094dd71f2a2540d44abf2a7d5ed014520c593cc557a6",
    "signature": "0x873ee4ace9fc160f47838f0ce5bbc1821fa954e09005d9bcc4a73ae186a664b61ed617ff445831ebd04d260824ea946d1caab81f6dbfbfb70d583f54918c20ec1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}