{
  "manageEntity": {
    "action": "Save",
    "entityId": "911159",
    "entityType": "Track",
    "nonce": "0xfa1baef87e56839f479041005bb4874f3e874a85c1f339dd28a966a3e8030364",
    "signature": "0x8b9c0ab74ffc3f4483cc10e2337f40140c3bd79a8dfbbf1e4c0479788cbd4a596a90c892ea0a1b962b979ca5acac6d5be305ce8ce349d3909b1a4977cdd6810e1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}