{
  "manageEntity": {
    "action": "Save",
    "entityId": "1568368217",
    "entityType": "Track",
    "nonce": "0x42625dbbcd54675b4a10be976fc7b5632f66df728731a555a30f3486a8c430a8",
    "signature": "0xde07a7842fa7d0f7fabde6cecfee35a511839d33b74fd9b6a865ac7a973917a6589a4f7e521a3f63a6c72f967232ae5d95f363bd01ea1817c41d1faada084b741c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}