{
  "manageEntity": {
    "action": "Save",
    "entityId": "1485259996",
    "entityType": "Track",
    "nonce": "0x4e5eb9ce79260ca7d700420637391eae9536dc01f2c5d9b2634b41ee45048fc8",
    "signature": "0x83b41ec4fb05e917c41c5b53cc07538b337095520f5b9db48f4d59e0032d1a4f4c0e86e6f8f2e13bd102280a612a8356c660b6c0afb64c6848955a5b087afb1a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}