{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646494521",
    "entityType": "Track",
    "nonce": "0x801c781656b255bd13204e59693adbf4c79a0dd33c43441a7a8de8e44b95ed68",
    "signature": "0xdb13121ff88c4215d40251e059708d0fbd54a641e3f8bc22a7451c741974a31e027910d39cacb204c600471bc1e3430b4af1167b525b6425402de17b53ff5b301c",
    "signer": "0x8DF20c419C0a681c95c424985402eEe31981b6Ee",
    "userId": "376291"
  }
}