{
  "manageEntity": {
    "action": "Save",
    "entityId": "724253343",
    "entityType": "Track",
    "nonce": "0x6074dc1dd49e6dda952496f97b6d826f54e54de5fd1dab831b7d64736da04fdb",
    "signature": "0xb331a92a95f7a5f5c4fe45ac96ec1f63ff91def088a99651cef34b01296f98a74b8b8b54a76f6010cd110444a4e5e10814ca4f353ee9d20c0e26591dd02eef361c",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}