{
  "manageEntity": {
    "action": "Save",
    "entityId": "1457651086",
    "entityType": "Track",
    "nonce": "0x0d421e9a548bb0450d5c8298917ca917032ff72f0a4976501028b03f0f63c618",
    "signature": "0xdeb260a8063d08e5d81490fa297f8b4b2ac4c465b3de908a7be55ec3a03fd72148e11dd10dc3bd01a6c8925d20e4b0708aab60277c10548d97e1bcfa104414161c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}