{
  "manageEntity": {
    "action": "Save",
    "entityId": "1875073461",
    "entityType": "Track",
    "nonce": "0x083695ff22eeefe373db8509ab2283496a116e8d2b5b9eace3577118392d3eeb",
    "signature": "0x8a2d7a7810bed7481190e445d6b9924f52ad6a38f75922b3151ce071055a0d195f3f04a10c1abb153314120d21f54f90541eda31eee67f31a64f5a3f314f0aab1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}