{
  "manageEntity": {
    "action": "Save",
    "entityId": "882739776",
    "entityType": "Track",
    "nonce": "0x565c0f78e4c8f8d0f09f39467502849bb9d2e319d747894c0ad52bb2c5baafce",
    "signature": "0x9b9907f5b4a82d9e3b935a35263d66886b7120d2e28f7602653c9917866e7f97137381abe78ed636b709d6c1839ae2b24fbcf487966a3f192f5825f8206e3c301c",
    "signer": "0xE5B01ffC0f6C8237F3F8e55b3c67A263E1f9a4f5",
    "userId": "498611290"
  }
}