{
  "manageEntity": {
    "action": "Save",
    "entityId": "1990346063",
    "entityType": "Track",
    "nonce": "0x8fab9bdded201b29d90f27b63ae2ca0a0195b7a5f2fa74f0f514889d8406fd56",
    "signature": "0x033c1a19ff605836f013b5a3ae06f89b641dfad673e7a366649d5d201981bcc17ef4dc85c83edfbbe0af964861ae308e279c108f42482a629a44df424b9902981c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}