{
  "manageEntity": {
    "action": "Save",
    "entityId": "1301460317",
    "entityType": "Track",
    "nonce": "0x7c61b857677c45dad962aecc17acfb18f69d6a64a3b015d438fe8f625cdc27e2",
    "signature": "0x9e72cfc526679c42ada4ec3ba6ebc1c7ec68b699e3f367846d489475363152302cd5bbbcb4758fd1e4703c8d916c384a23037252cbf2f418a4c3be6031750b551b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}