{
  "manageEntity": {
    "action": "Save",
    "entityId": "215199644",
    "entityType": "Track",
    "nonce": "0x8084a19a637c44dfda7cd61f38207a329745baa8bc8a859734f66b272623a6df",
    "signature": "0xa6d56a358a41bef6ca245051a40385b87e6451985b81df7ad741acb6b825c64758ea6098b76cc9c86c65b3e0e261f772be07f2d85cd71ddfc5991fa7b173362c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}