{
  "manageEntity": {
    "action": "Save",
    "entityId": "1357326957",
    "entityType": "Track",
    "nonce": "0xa322223e3c58a323c8c0b3b58dd832e109ad4521af0b5fd503183f2395acc6d4",
    "signature": "0x80189b8fef5ff9cd44e237e5098c478868d987d01ed01de8176d3e9fe9b3853c40b996d7a6976fc5fc4bca1b5ade9bea05f106ddc1e884d536153b0441aeb4241c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}