{
  "manageEntity": {
    "action": "Save",
    "entityId": "931904023",
    "entityType": "Track",
    "nonce": "0x9e4138dc6eb3040212c9eb8b23f5b946e50f4c0d8a6d47272dcf5d9056635b27",
    "signature": "0xa2850df972b4c745420765fc34b429ab191bc8dc7441467894fc366053e67ef250b3a301c920e561e0db0cea6af838fa600e6fc493e5f6f516e1d941feda182b1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}