{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962433097",
    "entityType": "Track",
    "nonce": "0xfbfc3b621ccaac7963a35bb9faddb0e9ee9c5fa4d1212a4d38d8136e0ae86f98",
    "signature": "0xf76105ece995e2861194e52f07017a04b607ee4d7523df04377aee6975cdf3746ff4bf9d4c4ce88324fc4fe3f55ccdfc0ad9c1c730802b37cd75a7f5705e93b51b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}