{
  "manageEntity": {
    "action": "Save",
    "entityId": "1791785759",
    "entityType": "Track",
    "nonce": "0x2f6b049daa5a57d9f4bf6e499fe2b3b465fd8bc35a014bafd4e1c1b739ee37fd",
    "signature": "0x2038527d004a71bcbc9fbe1369e4c638f095e223f0f55efae8bcf5b70bcfe18e7f639ba5e6e2a93d534f1b0e820a7eb0385c110ed6aca919858cb41ff4a205981c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}