{
  "manageEntity": {
    "action": "Save",
    "entityId": "128951938",
    "entityType": "Track",
    "nonce": "0xc2fe1c48afe0c5a7b9a95af85cca4739d3470882d5909558a20430d07d230b13",
    "signature": "0x83b907a420bed84d7bc8f4e097174b6705bb2fe41c4fc3a361b0d5429884bc41049bc76befeec421315ef16d8cbeb8239845fa3662e30795ebdadfa6d06d8e771c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}