{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249823962",
    "entityType": "Track",
    "nonce": "1790045702192663825",
    "signature": "0xe80a8577351a20dd14243ca6d08f693a3cbc42c6a6514de0690a421d497066f5449c2ba2565503f45fe946ac27393bf9eb91bda7356165ddcb89df47bc831d211c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}