{
  "manageEntity": {
    "action": "Save",
    "entityId": "227856",
    "entityType": "Track",
    "nonce": "0x7318f5a4a657fff30d97ffd832de824d67021621ed2cdb77c104df19a44e3d02",
    "signature": "0x78fa8f1830bb62fac837870811871f15225c7a61b2c7a98bc2eedfaf8b988d5369872886703cecc465cf4bc67ba6df0cb1ab1bb9665d8fffe30725e4ad018d0a1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}