{
  "manageEntity": {
    "action": "Save",
    "entityId": "704401135",
    "entityType": "Track",
    "nonce": "0x23601bcbf90bfafa95f90c57e14341c98365d56314e402d05e94edb854e0a5b0",
    "signature": "0x9617c31775ccebdc402f0e98c9c7e9219df00dca8109abc1c1cf2e859b31bfc74fb54c28d9fa0917b0a30ff03fb6eab0f6a64863581ba6c6b80bd57460d5d6981b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}