{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250100669",
    "entityType": "Track",
    "nonce": "0x8d3acbe1872334360bd06b8e8bd0e7ca8dee6d28ed997b54dce1f9e0dbf625d2",
    "signature": "0x8306b69a6d6eed418a7823d4927e2713b952a06eea4f7165561ae74858338eed5562f5e1994428c38cf2f65e437853e37e6e5541b4b7e5fefcfefa67c7c723e61c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}