{
  "manageEntity": {
    "action": "Save",
    "entityId": "902874991",
    "entityType": "Track",
    "nonce": "0x1bf804c13f727cfac5a263b1cc9772a3b55d28dcc6acf07bf88db12d68ca07cb",
    "signature": "0xda928db524da4372bd404906625a781f5c961033b6d67c2b29e7f53e353d9eca4108f843b38b277f7d0e65356739f4fa5b3d31464b570214655dd0f24cf498b81b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}