{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938277084",
    "entityType": "Track",
    "nonce": "0x73bb5dea79aa808bd6b6a8e9567819e518c044075db72d312255eec81c575c12",
    "signature": "0xb05f14b028b182add918bd75af35755075198033507bfaeb0b6f2378c5c5d336330cae2ae446cfba34c83dbe370a7c3f2440a972879d165fc96c27958c4ac4b91b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}