{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625613535",
    "entityType": "Track",
    "nonce": "0xd08484eb3e06587673e779933e287b730722bea07391186565c6be0c56751ff1",
    "signature": "0xa0c77039dd68a48a82f948ec343d87ee7fe349424aa72a071862b7ff345571a34c8292133bb0b8ea54894f99da44bb53ad397b792ec8150d1460b658f28ab2871b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}