{
  "manageEntity": {
    "action": "Save",
    "entityId": "2007278465",
    "entityType": "Track",
    "nonce": "0x360cff0dd87a75ab8207c964923107e683d88ba2bcdef8a6ae08b3bd95bdbe6d",
    "signature": "0x21945c4436aedf58720f02e3b373c075a275166b58cfa1d9a277de16660b7fe42090c80e8c53994cb4bef938c2de512a244d18bae0a9e742bb4c620d8730d7a31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}