{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739637056",
    "entityType": "Track",
    "nonce": "0xac975526290e59a05f768ba61422e68740bc043d770dd80eec2d355bb94b80b5",
    "signature": "0xceab69cff0e064ac276f3dd3e627fb44c0e9369f5ba7dc0c62f08597001d00b477a9c66feb71451756dd632277022b905fd0eca486f4be9d1b6f170f56accceb1c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}