{
  "manageEntity": {
    "action": "Save",
    "entityId": "262793",
    "entityType": "Track",
    "nonce": "0x32839b6acb92fb1523e9a67f6dca99dc61d4f9a1d4130135503f8888b14cf643",
    "signature": "0x96b207e216f26736f9344c80336de749c27687c412f65941c6b8360c5c34f38a7866bb1eca93cada46514e955578b1467a060c7318a0c027ea6ba18567392a201c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}