{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107466",
    "entityType": "Track",
    "nonce": "0x0120d8f8f8bec58b85f3fb471420d510425e02c8477dbadd9c7f67ed4ddbb641",
    "signature": "0xd26c06557ce0541ce8436428838222a1d280c4f8ebf6c154851dead574a059cd1487b0cef046cc62b5c5997f6db0e24afd7ada75fdf844b25c9048fc704625ad1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}