{
  "manageEntity": {
    "action": "Save",
    "entityId": "231370546",
    "entityType": "Track",
    "nonce": "0xb9f9d16ccdc59b8ddd77cb6208cd3dc734f1dbbd4611baf5dec6266634f57216",
    "signature": "0x1d5ae550623daa9c8b2181ca90a46ecc10a7a5f582ed708aa27399453c96791a1ac3d3d7d0ff0077ac918946679861b6a0f429a6356a0714e7f24bad9df131071b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}