{
  "manageEntity": {
    "action": "Save",
    "entityId": "985943486",
    "entityType": "Track",
    "nonce": "0x5a29f1a05847969e2cf6c7b28606a71ab6107513285d9528148d92bc525bd18f",
    "signature": "0x3ba2128951133d6dd27f94f03901fb706aa655946c09c8ae68e6101f3a42636e50252a33e5c674d457d99748c6127339f0812d15bdc15646613df3a7cb7f3fdb1c",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}