{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf7a60155ba0df647eb780cdd5ff34a8d195093698fe960cf2e1e50ae44a70a38",
    "signature": "0xf9cc888bb1b7d6683a29e996c6147d5f94c62e901d437488eaccb75ea9092f3c3b0c2dd7c129b9e44bbfb29d7a51e9fcbcefade074d2fdb20544a258dc7fcde11b",
    "signer": "0x98426aC7F9c10c2F0c2a7914943053562b5db449",
    "userId": "981395135"
  }
}