{
  "manageEntity": {
    "action": "Save",
    "entityId": "1862498559",
    "entityType": "Track",
    "nonce": "0x7520b53f9d29b99896f525297e62b0e6bb693f327cf3ca231410d5560ff7f674",
    "signature": "0xc0c730e5302cbbf44794d7771754a17698a43b4687c5f187988fb959b850b9fa5fde958c42a6e99a3f1cc39b7a10d4d301c2a9d01f7095bbdfeff8adb2b1e14f1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}