{
  "manageEntity": {
    "action": "Save",
    "entityId": "537261237",
    "entityType": "Track",
    "nonce": "0x542ffc550b25f0de05e7ae5d34e6baa6f19e426a6e44df55819743ab6a5691f2",
    "signature": "0x2815280651246d6cfe68c037b74a8225194ebdbed7e4ee555ceafdc31c63b966087d50a2ac00ad57a2abcb60a5cd574e94d2d433dfb4dc8c44296fdb7e7681251b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}