{
  "manageEntity": {
    "action": "Save",
    "entityId": "1056340266",
    "entityType": "Track",
    "nonce": "0x53a80765446d4b2f7d791aa4674bae7988e11d81f48528b1ea5fed9127c6d18a",
    "signature": "0x173eab0f4cd38a5f7529ebe186634b7715ecdfaa620a140f2fafabecf5a3388c3a2dd055f6f9b94d42602dcf9415f45175190bb63947a69f844f80c84e661db71b",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}