{
  "manageEntity": {
    "action": "Save",
    "entityId": "1128764890",
    "entityType": "Track",
    "nonce": "0x9c7de4edfcbc3d75dc604f4762276d2c4c8a94cfcc0c7d5aa9cc98c6b1c19ac2",
    "signature": "0x4b9c866d26c0be5c576276458144270a68c6d7117cfac45b472fd3df7f81f30646fa7c825e00cfe51cceeeda6773cd130f1eb1c1f2b99c7ebde01a5e85e55af51c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}