{
  "manageEntity": {
    "action": "Save",
    "entityId": "1415214523",
    "entityType": "Track",
    "nonce": "0x9a2ac068c3b3db6775b72fd9352f5477743010425df4c4695e8187ca9562ffad",
    "signature": "0xe9049ea433f8be544d56bd8142859e09b042b30597396dcfea6b72256563e6481b11b634a063d9ae04cba1672f10fc54db050082965a3f9254de20225a8189b91b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}