{
  "manageEntity": {
    "action": "Save",
    "entityId": "1347196354",
    "entityType": "Track",
    "nonce": "0xb479a41d35e04f67059c6bf10fe78f276cabd84f3904154b356b79819fe0f1a3",
    "signature": "0xfdfdd1187987aa100255d38e5ac7f9392b3e696f10e04c5662cca82b0a326ae828f5af72010aa5742121ed40f623f3678cdcf093bf8671af5b422b1c39806a841c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}