{
  "manageEntity": {
    "action": "Save",
    "entityId": "1158378974",
    "entityType": "Track",
    "nonce": "0x4f94f638fa4e9b07de210c5e0e62a6616965f51ad01ab8460e27f35714a8d797",
    "signature": "0x055b0d36a54ba2ea6c5593e152c116949be31d00f8fe3ce884021e8154a760360823fb235c6447e2159716d3fe83134d0bdec0686067890643a03fb6b6853ec11b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}