{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203033459",
    "entityType": "Track",
    "nonce": "0x0e29d0068ce76cf849d8d2da9283da519d643d9412e67862ffa21ab76864f0db",
    "signature": "0x8d610a6ec91925220f0b13f105b424393a67653b84d4e934087e8b27ae387790264ecfd6ac620a9eaf70ee615d899a279c6d5f99252082613831b991e82899ac1b",
    "signer": "0x736bA8382Ff1e5c66268EF8028c17783435BAFD5",
    "userId": "248414574"
  }
}