{
  "manageEntity": {
    "action": "Save",
    "entityId": "481364807",
    "entityType": "Track",
    "nonce": "0x7929eb7ff8bae125e0a2fa0f59ac10065087bf0fe92717821c8db3b9b358ff21",
    "signature": "0x473b80745e96182be0e2e208399352107c20d0718b6adbb27198910fc6b6c6d36258640fcab1dff9f20b3be2629814cf41d38fd4d6429ed17c53c1230e3a9d5b1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}