{
  "manageEntity": {
    "action": "Save",
    "entityId": "880331160",
    "entityType": "Track",
    "nonce": "1792443197335563478",
    "signature": "0x4f76d306ad914f9b296e08467c811d74452c799207f98d0ea1080a3fa20813c91d72e3c7e33982a461a2d58cd28c992936c83cca976a4193dddc4c8c826d9e1e1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}