{
  "manageEntity": {
    "action": "Save",
    "entityId": "1622720754",
    "entityType": "Track",
    "nonce": "1791478442013006276",
    "signature": "0x62d82258661a2ede80fbf666fafa8923d37d10545e5f5f77241a0aa43e45e4c456bcec96184c38816fd47b98a58819b5e31b8826644b13988f84f1bcb8741b991b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}