{
  "manageEntity": {
    "action": "Save",
    "entityId": "591023",
    "entityType": "Track",
    "nonce": "0xc75d8cdeb7868aa67305fc08e17da2bdaf26b37c683710376fe6652d7a61b151",
    "signature": "0xbe0b8ba073845c4ba4f7714373e6b59ce916a3b00907327dd38b47c51f18c2bb5bc61739ecae6adb6f44a4e3d28c4ab159e7a396e739ab45d18276a4ce488eac1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}