{
  "manageEntity": {
    "action": "Save",
    "entityId": "592049171",
    "entityType": "Track",
    "nonce": "0xb03b74f5185ff2f0613fced784710a028d121d12b282519908ae84c5ef246dc4",
    "signature": "0xd4e8f68eb3aee7f6383238135032270c2fae9acf6b12428bfc76ad62a8e09635581719a525b71e86716ef057cee1ec8267e985f664cd96cc55d1e5a62b3338df1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}