{
  "manageEntity": {
    "action": "Save",
    "entityId": "993360893",
    "entityType": "Track",
    "nonce": "0x92feedcf0923052e9d12b21c478cda361795d5388fe36cd23729536fbe0fd664",
    "signature": "0xb9bd7ed817cf05580ed708ad6568412808cc946c542e12d07268fb057842a8620fcec1f5966427fd96c820951a0fa6ca1d2dece7d9bb80a2fb5a06dfc60938c31b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}