{
  "manageEntity": {
    "action": "Save",
    "entityId": "332826721",
    "entityType": "Track",
    "nonce": "0x43650a8fed4365c9144e8095cde3f14a86537ee8a8e31aa63442e48e5324dbce",
    "signature": "0xd2e7f296aca00c90677e996b18619a00f94f1dc0b4bd3cfa4e7a918f8d74475b7eb8ca7fdcd9240de3420a6b42fa70446c5483dfedf154f6dc81e7a2afff0f2f1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}