{
  "manageEntity": {
    "action": "Save",
    "entityId": "336580",
    "entityType": "Track",
    "nonce": "0x2a117b86a35a5aee437bf8e0bbfd021067963b141bb1e7ddc68c2208ac4002a7",
    "signature": "0x669530d43faa12661fb3b27764ce0821ea9c3ad03b0d18d8739e58122540acc5548e6e37671eab0b25f0de47187e8566dad4e2383fedfe41236cb281d8438c421c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}