{
  "manageEntity": {
    "action": "Save",
    "entityId": "275187",
    "entityType": "Track",
    "nonce": "0xa711f4c3bcaea89970cca6b1ac9da1b1a1ccab4a1d08c093ede91b4c9db8b5e5",
    "signature": "0x90813cbbf3072da7d69e54650a4c7a979831709d2580bda7ebce40696c8115f249c1c4c87bdb213fc5551b79385a8413b4c19790b9c5e7ffd5e6431c0b04e87a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}