{
  "manageEntity": {
    "action": "Save",
    "entityId": "88223183",
    "entityType": "Track",
    "nonce": "0x727ad5956bbe23707cfc9826d0369be9daf63b99339101adfa9a5c657f76777e",
    "signature": "0xb8e6b354c5c504cd186c2f1e1b2338087711ecd620ba9047ed2b768c11f2c1503dd409107770941522744fb5bbc86971ec588d079aca0eaf3cd9c96e340584291b",
    "signer": "0x6B239e9B75f27b519de7Bad3a26a0b7d30e32D3f",
    "userId": "311257477"
  }
}