{
  "manageEntity": {
    "action": "Save",
    "entityId": "1140481982",
    "entityType": "Track",
    "nonce": "0xe63c97edfc281406918d9a5e237a239457e82dffe0403e77e175d7196086e3a4",
    "signature": "0x6b646d5da9d1c19aed44c0aeddd1ccfcdeb83d729500dc8724de8b6bbe225b9f2816f0d5a43c460c6bc2ee94c87063705743538f4198a573d0fa49a77ccbb22c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}