{
  "manageEntity": {
    "action": "Save",
    "entityId": "971636413",
    "entityType": "Track",
    "nonce": "0x2cd06add1472d0863672e0093043b1f17c294839f665db1ef81b879c24ec31cb",
    "signature": "0xd31fbedc27d5ca5262af8beb6149fcf8358d56910a96087f41ab755b090789e15c42b5863a0e2264830615cbe0735c6b5d455ca07b1bb6dae4283d15c665655a1c",
    "signer": "0x1A748d74Db6424f9EA1Ce41A3A445631765103bc",
    "userId": "799948905"
  }
}