{
  "manageEntity": {
    "action": "Save",
    "entityId": "302942159",
    "entityType": "Track",
    "nonce": "0xfdac14c65c3967fc03c0ab59389ae7c1c5980228a4900a2aec7433ee7f37105c",
    "signature": "0x21403dc0ee28e2be9811e2a29cbfed93cc99914f77d6160ee5b254c07968955561ea657ecca7997a110670a972dfd46256c463efeb06eaacbb3ee78d32c885691b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}