{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230959395",
    "entityType": "Track",
    "nonce": "0x63600e55a94d94ce9d64d8e8ed48727b9348d8e0529c8571bc988d3d2c40819f",
    "signature": "0x86b5b2d8ac5934232cff1e1e714debb96fd0e9be2a0f88981ce0368c91c40b0e13144336d1abe230b5b335e6c0dc8396922086be59486dc5e227ca9deca9a4e01c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}