{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116046947",
    "entityType": "Track",
    "nonce": "1790791736471015183",
    "signature": "0xdf964a6f150774ad37dad32b97ce7532772e420bc289bc022a4fd7a3429cda596f68c02d4b8557b5e3144da611d1f49bf29964df3a09366f3bbadac9a1ae570f1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}