{
  "manageEntity": {
    "action": "Save",
    "entityId": "1709008843",
    "entityType": "Track",
    "nonce": "0x6e4b6186d109a99e8fd63b05a25278f54300422a6885a2e187d4cf4fc92d044c",
    "signature": "0xf5f0af86dd4c3c1447000683448fb47f030e83111e8b1479c0f5fbc50b8cf294468979567102c1ec2e54e9580bba288cb927687fed076d9cc45773e1261093f91c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}