{
  "manageEntity": {
    "action": "Save",
    "entityId": "418513",
    "entityType": "Track",
    "nonce": "0x5f6d1dd22e02ca6311d9d353862607d72caacf64af7e6be133d26a782c5316a7",
    "signature": "0xce9369dc525a44d0dc105d3e3524b692d83d5ea0157724a281b1c300452578031ba8531f86ffb979f5316f1d47e8bbd9455c6c59f62541b6c607689cfc829fdd1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}