{
  "manageEntity": {
    "action": "Save",
    "entityId": "1805737496",
    "entityType": "Track",
    "nonce": "0x29c92277b1854f41ea381aeabf075826a373c624abfc9b20016f58b1f7eaf91f",
    "signature": "0x72591e5a305e27a694c3be3a8fc8cf63f4e46c362dda082dae5e80f109c6da2c3a1b397e095a13ee018d593d91e32ee4f5447d466b036e7a360cc90433559a171b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}