{
  "manageEntity": {
    "action": "Save",
    "entityId": "1384110124",
    "entityType": "Track",
    "nonce": "0x8b280d130e8df996d61a54edddcbef4d2a66c9df5d14ae08f348f76cacfa73a5",
    "signature": "0x307a4bd99341f769d5fbac17fd10dd22af3e6a4acaea74698a2387822e5ccc9469009fa19e250d45da7be8e11729a73937060dd1ea51e967131bfa3ea331c5831b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}