{
  "manageEntity": {
    "action": "Save",
    "entityId": "2116869946",
    "entityType": "Track",
    "nonce": "0x7231d555a918366a7c5298461a016aee5bf39250d5b355b2e71e412b6129ebad",
    "signature": "0xe47bc9c7f247edc299bfa3a4fc001ecf385916dac8f5aa1e5f5a8832226e476419195708a4f70f6a2318e54e3e9fde8774ad501c837a5705f10d5a1ff7d214c91b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}