{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346216486",
    "entityType": "Track",
    "nonce": "0x0018e33c7dac070c143f29cc5c1ec07653371d37d62029ccd095368fc9e557df",
    "signature": "0xd79fcebda564b667041e35943d802c6ba4f8bec318c657baad0ea4bbb8f29429327d4ea0d25107e83d4f9c518a59ff95dfbe9d1848909972aeb5d171e74e03001b",
    "signer": "0xfE8b7901289A70702AC15CcB11911b872E54e80D",
    "userId": "540022120"
  }
}