{
  "manageEntity": {
    "action": "Save",
    "entityId": "438893",
    "entityType": "Track",
    "nonce": "0xaf8b900b14dc8a17d676cdba05ecd1754992acede74db72da50e280c8505bc2d",
    "signature": "0x7d6e5b319624cd036a5ea0cd9782b69038c4cc761a7a6f7a8cb8dededc0126ae23599c9b2a81011c32a9af2ddc9983730f67d7222e529c491c811971bcf715db1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}