{
  "manageEntity": {
    "action": "Save",
    "entityId": "853726882",
    "entityType": "Track",
    "nonce": "0x76c887eca3a80e4283f77a0279f9c7aaa7d56789ea1fbf4fcaf2ee01ca49267f",
    "signature": "0x900d096796c2aee574ba79cde73f577850a6516920d5069594296f3337f7c1310c26a7b8d7b207c2097ef57bb421c855f44d0de5198f6f7d06b1d7b565de55831b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}