{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375353454",
    "entityType": "Track",
    "nonce": "0x6fbc9927b14b1035d9ac0fe3daa269de4950a1d8bc416b48e3ce2f9fbd04438b",
    "signature": "0xb2a8c9c55f651ef6b95b7547f4d37dfb1ef1f5621889c95e5164083e1894c71d18b8d6748b64bd0fb67733a23fb6081389507e901d8b6e872f5c15a9a876dbc81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}