{
  "manageEntity": {
    "action": "Save",
    "entityId": "1051450",
    "entityType": "Track",
    "nonce": "0xb5b82bd90b8700870e5d90c3f4653cd76301fdda9e0b750cf203d2ccf042413c",
    "signature": "0x726888df7fb29fb33dcf808de160c4e8ef0718e80f3dc7ed62a0fcb7a3ada138737bc0be8217a1ab3dfef7ad8c1319cae7414f2594cb6b299106d5b42e5885b81c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}