{
  "manageEntity": {
    "action": "Save",
    "entityId": "104731",
    "entityType": "Track",
    "nonce": "0x2f339269697a898fe0ed97fa27ccb5d5b8347b79e0c8578cc47474d21f4663e0",
    "signature": "0xc9af21db5bb58ef2176a7ee8019eba284558462942dc196bdb4b99b95d53f8df76672703ee9cea8f4ad9815431f93a956acce354a41c2029b4f5341e96f1e1121c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}