{
  "manageEntity": {
    "action": "Save",
    "entityId": "200436",
    "entityType": "Track",
    "nonce": "0x8940b57b6557eda6e69ebfe72a3d8ee37f7dbda23fb4e71b807e5ce9a9346762",
    "signature": "0x88e4dc2258274f8dec7c16c70bdb4050e4671dd4d0e8fbc6e9c930197d2bb9bc78a64c6d887650313d7ef6818ddd0095d1d5911882fc4dcdf9142e6458e332e81b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}