{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458734953",
    "entityType": "Track",
    "nonce": "0x5fd215a41ec0429f45c4297f767c79879f09fb33570c5dbc6d90141c3691e08c",
    "signature": "0x0734ac006668485831b2a31c49ff85400b1d353acac8f9f55e208f9b9871e5cc3e1f51d30de5eba783ee2e55498dc361fcfa8fcdb67e7a39c1306df4b8b5b8371b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}