{
  "manageEntity": {
    "action": "Save",
    "entityId": "388934",
    "entityType": "Track",
    "nonce": "0x6a8edf67f0576f73e4bfea76703997f42e321e4aa9a9769b7a8c5391da517d23",
    "signature": "0x592da9bbe248aa5136dbb9024e35b68f0d29b55f9b3bc4f2114a18047e99bd195ff7a490251f5cbc0417d50c5a3d997eda42f92920b2d712a7d539d754b9af071b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}