{
  "manageEntity": {
    "action": "Save",
    "entityId": "1733461282",
    "entityType": "Track",
    "nonce": "0x203b7f163c6782b7c4c77c8961691457aa92be18f4cb619cd593a57fe4403078",
    "signature": "0x0e253c3fa3866ca0f86edb35fe074f2ce8463c965797f86477fd7e3b731ac78633fb0f258c198754e60d459328707f261d730e0b9fa605c5b64b1834b6666c5c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}