{
  "manageEntity": {
    "action": "Save",
    "entityId": "540905874",
    "entityType": "Track",
    "nonce": "0x4dad6c425af382c69daa6a3ef1431ea1bb65825089ae224b50bfa3d977f17bcf",
    "signature": "0x3a17421e82383e2826d1875811da61b3c270cac519d66dc6e8fb4936e047a38d10ab802a22c4fce49e58891254652401f0c32ce986e6de97caee8a6457a692101b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}