{
  "manageEntity": {
    "action": "Save",
    "entityId": "1651549674",
    "entityType": "Track",
    "nonce": "0xec66372713b8c901ead836cf34ca9e5cfcca38fcb415bd25c387c3d13554954b",
    "signature": "0xb512bf639c2d5f379ad5e024d88c7c4d60f48944c46f3fafc303b4aa7b5d951f7f92701fb59e83b1a2dd2748fc7cd722132d411a4e02607b50ecbb140ec6226e1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}