{
  "manageEntity": {
    "action": "Save",
    "entityId": "941021986",
    "entityType": "Track",
    "nonce": "0xd773d3e0389d9375fcaa2000f1a66cadddb6d70fb01eb83c53eb1737b2ed3008",
    "signature": "0xfbd55819635a4762d6423ac89ca589e832023172cff1c5b8d1919f6f1bbd647358b8e351718966195b257c207e588f64b2bdf4c2db62138d321ff2f298b0a5ca1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}