{
  "manageEntity": {
    "action": "Save",
    "entityId": "283568136",
    "entityType": "Track",
    "nonce": "0xb14485ca4150bdee23ecbd3ab8f1ae980832fdba8530f8c67c962d402fc45389",
    "signature": "0x168a28f5737aa2dad82810d85b080460d9864d8271846f1b6c0c751d4db8925d2a429b31e866185cd326beb95417a52b13698d6bd6ca462018a13a34b9152d741c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}