{
  "manageEntity": {
    "action": "Save",
    "entityId": "631520345",
    "entityType": "Track",
    "nonce": "0x780d2f40aef48322d84b0100f50dc4e9f39f7b60cc3b4e5c7c73f8bd16e30b16",
    "signature": "0x27cdb0ad4d6524da9b06f9b60f0b1666a46d1dea6c7fa43cb6a0abdffda606f42cb6ea1979ed819f83c98ddd33b3553a641b136ec9cd1430d34aaa847dcfee7e1c",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}