{
  "manageEntity": {
    "action": "Save",
    "entityId": "1597973041",
    "entityType": "Track",
    "nonce": "0x9934bbb769f14ea83bd76f7042e5674cc17002e3e2beaaa27e5cd0f43261d1bc",
    "signature": "0x4429c72bdced08315d669176b1f1d202971241d6cab7bc39de6c8145dba17bf20b3e9329e8d8dcff1ecd23c79dda0430720caaf8072d160da09dbe9b6969df061b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}