{
  "manageEntity": {
    "action": "Save",
    "entityId": "1694292769",
    "entityType": "Track",
    "nonce": "0x48951d6378b9e22eacc1e73d248050082ced272db4d37d92bdd2aa170af1da41",
    "signature": "0x3a818681428a327d9f2c0960040c44f221ca08300ba59fd9c27033e6a7b97ddd4cdb394397b5b1fce78f4eb83f8e0018ce38f1e69542f80688f98220f4dd51211b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}