{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745200308",
    "entityType": "Track",
    "nonce": "0x57bed030b72f0003be0654b4b95545f85679be76071c30548ba59d0ee7018d4c",
    "signature": "0xcf3a1c51b0cf5ba6d3290b6bf16237a5896e623fad3330fc8c331621581fd295270463d8de9210e4a4a5483dd74daff51a9ac8bc39a163c5e55e9a3b0cccc5cd1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}