{
  "manageEntity": {
    "action": "Save",
    "entityId": "192321012",
    "entityType": "Track",
    "nonce": "0xb97a7f5fc7f31a61600a7e4beaf14cfd143f55b79523d9e45aa582d3c67e59fe",
    "signature": "0x26bff0c72f854edd4376d58cea3fddaf451b4c1a302d3f9052c702e6ba0fe8e6421142b165fa90745cdc71f1e5fed72d1e9e442f8a60fbc4f72b3b83c1d90b761c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}