{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895032017",
    "entityType": "Track",
    "nonce": "0x57145a5fde34aab58ff617050dabe23cb5c57009432c15f455ca54b8775726b5",
    "signature": "0x83f50c3c31d98c757657f76a47233b79ceedb25688829285b402a6cdf84ff134435d1f89b5ee00b4aeda98c96af6f8f09b0ac2bce1df960402f9eb98bb40b46f1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}