{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530917900",
    "entityType": "Track",
    "nonce": "0x89146a7461c691bc83c22a72246132d4ab3cf6f3fedcf3f7d0dcb019f83d74cb",
    "signature": "0x3939b257ae5d9510dbbb28db6d97cf12d62bbd349504f088795ce4caa5640075542920cb0f7ef2ad43c7b998295ef5bb0c1b370eb097ba0b1bbf4db3e520487e1c",
    "signer": "0x11EFeB5E02d1E5FF95b12f694953DC15ACEc8bbB",
    "userId": "191130508"
  }
}