{
  "manageEntity": {
    "action": "Save",
    "entityId": "386310519",
    "entityType": "Track",
    "nonce": "1789848706034613054",
    "signature": "0xce72c3388f6f521754f0f7f538887683d56f3109c765a2f453f41e9940384b896fc2d78c92cea3367f94f7449ef7c7a20e9a61923a4141da6024aa0be003e9981c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}