{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019328557",
    "entityType": "Track",
    "nonce": "0x4674686f1189bed882347c4b1488915dadcef5d1a8cc1ec67d1be112171557a6",
    "signature": "0xdb955d4e2a8751ab110e10329799299dd4da8848f6b3478a230c8cc0ecb59d8d56ddf86cfae2b91c770bd1e453a9cc75a70375c48dc1201cc79135cbefc368241c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}