{
  "manageEntity": {
    "action": "Save",
    "entityId": "535753175",
    "entityType": "Track",
    "nonce": "0xc16f0b06d48f25569b2798536c3066aefbc040729e6aead7f0281542ea63cc4c",
    "signature": "0x3349417d48604fcb76300e8129145f6834b042fd6da4f2957d24ec47acf2d3096b091af9e8ff75171af37362791b6ad84efe87d516b371adae7e0cba0f0799161b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}