{
  "manageEntity": {
    "action": "Save",
    "entityId": "1312838411",
    "entityType": "Track",
    "nonce": "0x8eeb2252bb370fcfcaf770fbb9a704089fadb6a2f289866c459239c533e4ca99",
    "signature": "0x5bd715b735ad4eccc7810679825ac9ff5f14ef868d228e53c9b4ceb1d9b2841943a6a001b67177918f474c9fc77a031ae2646073687735b6e428ebb6c12a96871c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}