{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810724630",
    "entityType": "Track",
    "nonce": "0xd0221eaa778945787b0b597a6b63bdd8e35cf174e94c9c9d12ac9ccc5ad75ad9",
    "signature": "0x05265c92930f99104e84147957b1fa2fedf3971c997b61a263ea6a7f87ba8cbb5033924713570100527fe568e16425196c85f4b610feda173abb8309eda457321c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}