{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588874128",
    "entityType": "Track",
    "nonce": "0x25837c0f287382492adbccfc25316f49c80fff01cbf59cba20326ec5eb056429",
    "signature": "0xbbf6c0a75e12c6c928198ee15af17e5939eb7c9b117075e220077fd17811d01906e66d1a9c768295ef6df13b386998f2ac4ee1b6cfed30276650b7ee7cb918871c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}