{
  "manageEntity": {
    "action": "Save",
    "entityId": "354154",
    "entityType": "Track",
    "nonce": "0xa97b72db64a6ce7d4483ed83cbcf8ab73a7c3b8d29927d808bbf8ed2a06b9e6c",
    "signature": "0x46ec82f39462ca99c234fb06c821a03a30b146333ad60aba76bdac9d35e85c087f64a8b1f71926ddfdc0d299ac0710694975b00e8088b214bcc53cc9bbb89aca1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}