{
  "manageEntity": {
    "action": "Save",
    "entityId": "243082178",
    "entityType": "Track",
    "nonce": "0x1df89c12f4df0d7a1638564ffd65f6821b642fac197a257ad4943825761c7ef1",
    "signature": "0x2a5b557007b1540b7385f38658116de5b370c623eee42771a1b4fbfda1c799c91d335f8423ed42135c265826484f32577765aa7c459d458859b5061c42f36bf21b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}