{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6da676decc2939d2f36c7c90a115f355a142538bdb1a16f4b7b23061f18e44fb",
    "signature": "0xe97da8350e3be36106e287d835368f5143e1c4f4a7aad0821b24f03c99944e453c072b1eda1e98abcc23b1e7283b51bc878b5d58f8965a71c569fbd833a1e5ff1c",
    "signer": "0x1f22425addD7DdD5287f86662672aC6Bf6362A8a",
    "userId": "762700956"
  }
}