{
  "manageEntity": {
    "action": "Save",
    "entityId": "592245825",
    "entityType": "Track",
    "nonce": "0x3e1f4eba262591b628f29a87c2472528cee591b3ab3cf4f8dbf8adc2d2eccf31",
    "signature": "0x041d65588bac45f3315615c7e447784615f424fadf8464a4376ad594e25965d630a8e6146a03cf047559b04fd12d06784ef36c9fc5d6fe7e8530e952a81b0fd71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}