{
  "manageEntity": {
    "action": "Save",
    "entityId": "736586209",
    "entityType": "Track",
    "nonce": "0xf98af07dc58dc98f679be72a063cd2f29419e0883022ae168480918959bf0231",
    "signature": "0x7f2f82f23893d1a37b335628160e20abd8695e215efce0bf1a2c0b6921355a5d7e6f8ee1d40e12ae12398aede37fe21e906b459116a2c02afea71d20a54fbbc81b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}