{
  "manageEntity": {
    "action": "Save",
    "entityId": "1996152352",
    "entityType": "Track",
    "nonce": "0x6d98ebf5aea008fdbd1ea82f98df9f54c16c062ced43856a311a1e9be45c376a",
    "signature": "0x628edce6ebbdd7cc6baa5b3c0783d5f9b0edaac18775e129f79c4ebf3855bf4b4ce95fdb51ab29cda82ec9b80e564a3d1741cf5e83cc28f93ec3b74e6ac1a0d61c",
    "signer": "0x17dD449C895B0Bd0695f18B39fc782E606c2a10F",
    "userId": "718782552"
  }
}