{
  "manageEntity": {
    "action": "Save",
    "entityId": "276680491",
    "entityType": "Track",
    "nonce": "0x316f2d00d8880393de275e068188c423e61e97059a5ce3b12b3e5714be8408d1",
    "signature": "0xabab91487fe292b8589eedbde8d03f25db188ed387b0d883513950d993a8229372aadd151d62f54878347e8d9429c3363e7715df9668fba7649d6a941f65a07f1b",
    "signer": "0x54A7bEEa4225786D727D79eDe3df2AaB446aC63A",
    "userId": "757958666"
  }
}