{
  "manageEntity": {
    "action": "Save",
    "entityId": "428368",
    "entityType": "Track",
    "nonce": "0xabf93d95c9e0b5562e1b151df9f72009e02f859c658ed3ddc6d42a827681e175",
    "signature": "0x24815b4a0a1ec6361918b2f8a7715d53187c57bb75c5b2940b1010d4b0a23551645e26ea163758fecaaae1b6276e6f29b97bc4a2abef22e1c505e6acd057ff491b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}