{
  "manageEntity": {
    "action": "Save",
    "entityId": "87224547",
    "entityType": "Track",
    "nonce": "0x5c0b67b28218f90ea17b01f78326e5426ab21987d24af9b2d765afc12878efaa",
    "signature": "0x72f09dec7a790044593fc890c74314d750c1d4bb0ce454f53cef9d02519383ba206836298789ce73f8b6158797bae11c11fdce548ebf5b5b4e608b02b97317e41b",
    "signer": "0x2bB7E42Bc944D023113eB9E0FC10079AEe4E50f7",
    "userId": "35744067"
  }
}