{
  "manageEntity": {
    "action": "Save",
    "entityId": "995039919",
    "entityType": "Track",
    "nonce": "0x3e1f358ab5e121997b2a0bb1c1d47c27e3fb74ddaf61af4190424b848da025dd",
    "signature": "0x19aee2f58a17f37ac1e37ecaa379bbcec6739f560388a66facf279cbdb8e867b2e3f23db20c2bf30c34604491f6ba0c9ffc21c836fc619e271645ceb7fc901be1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}