{
  "manageEntity": {
    "action": "Save",
    "entityId": "367582096",
    "entityType": "Track",
    "nonce": "0x15282ffcf14cf3ea751419155e060692e0e094a0a33800ebcb5ea3e3d4cc70c6",
    "signature": "0x8da502a58a9a92be8fc21829daf422ac2a29dcdef29f18bbdf428d5a452d9c7445d502866e45dd6e9d0e9a336e41a01511482984f02ae6b4af61907c6be25cc91b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}