{
  "manageEntity": {
    "action": "Save",
    "entityId": "1051437923",
    "entityType": "Track",
    "nonce": "0x820a93726160a7a4b98260cb77cced50b2ff24e3340a196550fcd6872b4e9261",
    "signature": "0x4bcd3dc997d3da401712224f4bc5ccf019901d524e4cd16d564bb915269ff292519cd53126b0132793569536139f53cdba1f70f3c132bc0d157c2323f22f61f91c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}