{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe7dd16d1b72e75819c6bedbad214bc57c0d686d2eddee967a1ba84a730c822e1",
    "signature": "0x95c7b9583aec9b830e0d96a7f2c0f253e7d00562ebf4d59da75ab2017e23a15354de460196843c77921caed89d0f9b42f8ceb7b02a8d0779dd0bf98a7e06c6691c",
    "signer": "0xd1946596a368736748D33b20A85DE7B2a84CcD2b",
    "userId": "650671718"
  }
}