{
  "manageEntity": {
    "action": "Save",
    "entityId": "361158769",
    "entityType": "Track",
    "nonce": "0xf5866ea518940928447a4c8f9d168594311e5c011b6cc1978f6a74e3e18033b5",
    "signature": "0xc5b080f770ed852aa5c75bfd56cbb69a73c74684f143942cb5027ddf005bf82a3cd392ca5c811c00092312c1e21dd158c6d3cf781366b69fae7cfc66535185501b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}