{
  "manageEntity": {
    "action": "Save",
    "entityId": "1031118817",
    "entityType": "Track",
    "nonce": "0x767dd39cb5dedd491c71ccb5668e9880962c390daaba90a5f28f3864b0e8f63c",
    "signature": "0x03652d8def97d2e2fa88b3fca0b43d1a9ee56765d1e2371e6447cec7c86edc5d390c4c5ace1a7b52a92cfd1850bb77d36be42b3dc4665d1bcb7b917fa8fb7f401b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}