{
  "manageEntity": {
    "action": "Save",
    "entityId": "554512",
    "entityType": "Track",
    "nonce": "0x060f9ef06cc4da508707dddc4015ba1ffcf98d57aab8202ea147b3313b5a0bd1",
    "signature": "0x0a0fc21d0a106fcf8542cfdd72d12b8db8c2faa2eda6ff023e3cb7d7f1e50f645fcd495aed12f843d627aef309ba06e976f092c252741b727de29a00348cac1d1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}