{
  "manageEntity": {
    "action": "Save",
    "entityId": "174323347",
    "entityType": "Track",
    "nonce": "0x1f9aa81fcbebd41dee6535bdc9c9597ddc328b04d2aac6a5c6acc99550a96401",
    "signature": "0xa491535856e9dd67165a86304f5f7a06334c593f205f393a54703c4a5adf8f1345e7d8691cd56a477adb92c422984cb353224152e4c4fa8a205b9176560f3d0d1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}