{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625725336",
    "entityType": "Track",
    "nonce": "0xe33c2158e81d17f58369d147f48fda571d0e35efaf71393f9e6493bfbd17a9a2",
    "signature": "0x4c0022ed3da74f290c295389690bfae85453f77854b04d985f67843aa74e5c582bf217f60e0c3c57a486bbadfc53044eedf99968a7a9cc1014ec0a84197f4df61b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}