{
  "manageEntity": {
    "action": "Save",
    "entityId": "272450916",
    "entityType": "Track",
    "nonce": "0xef99039fd1a12c1df727438dfe66b689fd346926c9bcae6867f11c4a7539238b",
    "signature": "0x23fb20079b93c8e5f9903124dcbce038477a984a149c1b515c156d1b4c5403071b82e12ba1fc55ab9d7c2430f35de0834ac03b5ce70571072e318079c38b608d1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}