{
  "manageEntity": {
    "action": "Save",
    "entityId": "729441875",
    "entityType": "Track",
    "nonce": "0x041ef7e1ff5ae23f5abbb52e3fed4652325efc3f0c7a5adb44bc0ee67b6a5703",
    "signature": "0x1a50f2579675e075229b925654ba54d0d4a85e4cf7ff70ae515a578ad91e2bdb3aaee46a7d5793660fddbced5daf587c31ce4d38683772b9bf0bcd291ff8ca5e1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}