{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359292461",
    "entityType": "Track",
    "nonce": "0x56e3dac29b4d8fbbbf2a041b7ba1420fce548327599a0c008f5fc370c7674313",
    "signature": "0xf70af98b4eea98a7f46f8000253d052dbed563815418f93e52fa975c41450a39087b098d4f3bfa555c89b9c109f8e3961bed31f8dbdf39c64188f0aed78a69f81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}