{
  "manageEntity": {
    "action": "Save",
    "entityId": "704575579",
    "entityType": "Track",
    "nonce": "0x8fada588f1561ec287462b59128c405f50e4ec58aaf913629be47dbac4f8dac7",
    "signature": "0xbbb803a6344054e6efa2c222c773552dd576df886fbdc234f75f308569dce9602d060484a3ecf3fe1d3608d0d3999dd57bf752cf64a232575d63a2b5dae1cfb91c",
    "signer": "0xE6a2533061175ED4c7f073A7BE3dc4189A4DE47E",
    "userId": "427249190"
  }
}