{
  "manageEntity": {
    "action": "Save",
    "entityId": "391047285",
    "entityType": "Track",
    "nonce": "0x7d250648bee8d439c127fd25d9eba5d3127557a6a1dc917870457a1d572f29ff",
    "signature": "0x5d5edffcad8ae927e14d49bafc876b0a82236e5cfed186cdccb9de52ea26d6f10b5372986124782a553ec8082f3615f2b8b9bb811a2a010f79b17afc78c9e0c71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}