{
  "manageEntity": {
    "action": "Save",
    "entityId": "799498",
    "entityType": "Track",
    "nonce": "0xe998551eaa2bf88b24f7f172e29ee58bd932099261fa7f0b4cf78fcf3db7d3cb",
    "signature": "0x872935a0f6b78a99ce183451edede24a2ac1e16ffca1a9636bf51a56ea41299c03fb9f8f1248f0ea3c111401aa602204e66fa9ebe673fdb0488a6ebce3814a8f1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}