{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580526313",
    "entityType": "Track",
    "nonce": "0x2e071761faeaa285f173de20c0612189e1a4c35fdb64a1f772f2ff166ad88058",
    "signature": "0x313805f204c73479fefbf3c056e0c75c83149cef4a31270989b5b3d1d9041f0769ac530498a4b1f3566878c1fae1698fa977f42f044c94f45cd3b81ce22216571b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}