{
  "manageEntity": {
    "action": "Save",
    "entityId": "183499",
    "entityType": "Track",
    "nonce": "0xa7226cac48bc40bbf66abcf900e0fe517c0315c1128a7c8e7350df1f035de8d5",
    "signature": "0x9d72ba441564c6f2c75812b960a97c1d20619ec04ffbdbceea5ca2e67ccb7e69110dee52ff8f12771419bf3035cffdbcbaf61e846c1f9fc4ca91bd23050b2c871b",
    "signer": "0x8a278E79c8E7e655B94c3e6798972A44Daa2c6ad",
    "userId": "24098924"
  }
}