{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304534982",
    "entityType": "Track",
    "nonce": "0x524333659649a6eeacf1fbe32a6b2d00ee2ecdd042a5f9cf943fe48237310fa0",
    "signature": "0x691dda4249ebe3830cfc5fec8b9014e032f538bb2e2387133b1001070a13463e6d64d1daea6ebb1e88a29f16a04b7e4680a6957c9e4d033ccf8931e4a9002f261b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}