{
  "manageEntity": {
    "action": "Save",
    "entityId": "541120",
    "entityType": "Track",
    "nonce": "0x232259e4991db3d85275cb0f899475f1a19261dede04e57306e14b4a9f38d697",
    "signature": "0x5063a735c74b4fb03c056b4ee6b3bb969c4af0ae7456962fb6781c55a28137287442b844ee2ff9c33777998dc27a27231d1c00d1ca79d459ae4b3444794623ba1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}