{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7edad457a345d397a312cf0b0c0c51b12036d9b1c726aa7c4c98a8376aad38aa",
    "signature": "0x15c0c442691a94abf15ce90a20ddc644aeb8a325c55bcb67bac2fbd82a0eeae53da2a97ba6476ff04d4da951a454237e069de25c5e04329e06e62c4cefbbca681c",
    "signer": "0xE5379bfbA21050bbFd5a8B9B37aA777B37D585f4",
    "userId": "328634906"
  }
}