{
  "manageEntity": {
    "action": "Save",
    "entityId": "441236963",
    "entityType": "Track",
    "nonce": "0x5200b3e9589ac6e3bb6009875d5336b470ef3414b3d35c6ebbaec94fefc8c964",
    "signature": "0xdf702106dea4e2f2350d02d37d474235425f6f31f90f30753db28a92037f31c805ce9dc10593b3a49048e8a3edd3810fd5a4ef63d154f352d7233fff1df5fe441b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}