{
  "manageEntity": {
    "action": "Save",
    "entityId": "81238",
    "entityType": "Track",
    "nonce": "0x4f65794d12871080ea068250c900215c981164baa21f2d2a452713156865d8e5",
    "signature": "0x19649fc29f1650779eab895f2e9075edcb4ca7409ddf2f4f8d3442a70644563308a4452f69fac4a236c06337a14915eddf6e1fc08603a399863fc4f86d5f05331b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}