{
  "manageEntity": {
    "action": "Save",
    "entityId": "470190029",
    "entityType": "Track",
    "nonce": "0xee9c0f5cac5748ed6a570cc75f4e24c471be17b346a121305c6997bbd0fb57aa",
    "signature": "0x4bb9e5d00b87a5dba1877e2a8bb2a52c80cd7b9818b0ba179722a62f8b31ee1e69d16525fa4b80e6479814bf32216efc820aa2cafadff151f372335540be36f21c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}