{
  "manageEntity": {
    "action": "Save",
    "entityId": "864384272",
    "entityType": "Track",
    "nonce": "0xb2901207585500c2cdf69008427db2399fbbdf2849c60ff944eca1915c2f6392",
    "signature": "0xf04600dcfbb47e21bcf363600227fea71300d6537fd96806a6f486c24bd6080817c5b77cebf59bc5f76749c59d0e8a1c6b9543c9af87a91c4b9acf9283d70ac91c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}