{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975138426",
    "entityType": "Track",
    "nonce": "0x40a318d4ec3b8b7458b2433fd109592b3c7337e87b86680b44b43f457ffa1eb8",
    "signature": "0xdc5652005e8902bd2af082b510f99947ed4de3443e8a8a0d90ac2858c0a6f659054d55fd1e29d480accad593efb64def950fb317577d4aadb6b7a747ad45e9741c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}