{
  "manageEntity": {
    "action": "Save",
    "entityId": "1398694076",
    "entityType": "Track",
    "nonce": "0x7dd6d5439625139e8a1fbc27f5d5d7b4c209e7f6a16f730471ae1d39b8e8e734",
    "signature": "0x70d04ff82273f7d2ee1f93e367dce3ea1e8eb5003c1594451af6afa542e75b91754bd22d5e44438505278d00e56488838329c0c78538dbe6bfc4ee672be96e1b1c",
    "signer": "0x8aB7d23D8c6Ea85540aDABD8Ef54b78eDDF14A7B",
    "userId": "709218456"
  }
}