{
  "manageEntity": {
    "action": "Save",
    "entityId": "1577584434",
    "entityType": "Track",
    "nonce": "0xe456523e386cbbab6f92592abeeebea105a40791fd6d9988e78cb4c16d3e1feb",
    "signature": "0x09684ac1204846edb28e5c8e62504ebf58fdab2b956ff91afefd670ba394057643e6b488f48cea91e421fbce8c99110f984a6b71fc16db8590bbb8fcd11012061b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}