{
  "manageEntity": {
    "action": "Save",
    "entityId": "1129572361",
    "entityType": "Track",
    "nonce": "0xf5955554ce7f1efbac44ec885f964349c2dcf418bced92d4a3f952fb03ef303c",
    "signature": "0xedc82f2a1e954f6f6842c8f1ce31e3ebdb456605b993df3037f811c4f670192459540d5f6f7ff0cf0ffc958835fd12b85b1c2d0b04166359796ca346e8c1d8dc1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}