{
  "manageEntity": {
    "action": "Save",
    "entityId": "85755171",
    "entityType": "Track",
    "nonce": "0xeeea85fb4d658a646d271c110e704c6b1a6aa3824285f5ccb617efb59741c1c0",
    "signature": "0x1af3e199fd45bf677f2409f0df18153a576d4b18de90514420fe505a24784f6c346cae14cc7ecabe6ab1caa1e1b6ac08fb294fab49c2a9e932b385fd7f8525291b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}