{
  "manageEntity": {
    "action": "Save",
    "entityId": "1294342227",
    "entityType": "Track",
    "nonce": "0xe2fd5cd5424a710c2698fb29f991ee4fff593e8ef8fc3db01ffac73600dbee8a",
    "signature": "0xc45bff9a1b1d083b5704d5feb9b4723166956772561209608bff9a9d3c9e4160073b53926be87cfc98163f9b94dcc84eab547eef0c615b8a00517dafcde979951c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}