{
  "manageEntity": {
    "action": "Save",
    "entityId": "1322840173",
    "entityType": "Track",
    "nonce": "0xf2c88d2d90f5687dd706d7b205944f7dc3291089d6d1e3751d2a7e2926edfa5e",
    "signature": "0x7be4bdb3cac96896ddcc8d919344c8666a0b2f68ea30a09126f273348ebd55ad22059d7b3e2e8b2744a1555d29955e33ecda38222654db2549b42802a1f76c651c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}