{
  "manageEntity": {
    "action": "Save",
    "entityId": "443534",
    "entityType": "Track",
    "nonce": "0x6568e925c2c8003ac8babbb371844a566275d30c182f5fe5f7347f40d4d1dbb2",
    "signature": "0x9cb1fb84181a5c550cd909a418fc2a4054def6ab6d1f0d395177e4f44c1c9f4b29713999d0700403af2ed8a840271fe2acaee030a9546574d3a6a718644406be1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}