{
  "manageEntity": {
    "action": "Save",
    "entityId": "159619",
    "entityType": "Track",
    "nonce": "0xcb4637ef988607e9a8c1b3f68da2ef44e841267fbb7825f84487412c51bbacfb",
    "signature": "0xfd026cef0d5d4a88a43e9266c541f93bbe0ca78c955a2639a730bd1e5e9701d3583cf267b6ea060873a5843ee0b6ad2527af9f216ac4fe7b6a971bba9e4656fc1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}