{
  "manageEntity": {
    "action": "Save",
    "entityId": "148701",
    "entityType": "Track",
    "nonce": "0xf7c8284fcd0fb2b66d6ebc5e614f45b8d709108b9042bf3b1739bcf268ec6866",
    "signature": "0xf656f381c783059b25adcfa83da90af106480c3257d7b3eea4e7668c2e30d71d1f8e2dde3b2e558c6648478566cf09a90db91cedf07bbccaafad8484a624e8071c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}