{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666699733",
    "entityType": "Track",
    "nonce": "0xc81b40eecced4a3cdf319d85ff1ee3e5623a213bae85b9f5410476dfa4b09416",
    "signature": "0x27b56e0a4225249e93bbaa504a05ad14853949a6959bae00f563f7cdec7e81d718a870d458c771fc34ad37eb85acc4f2c9e6c523a74f1c7a1624bc72766462e11c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}