{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x666dabf3a2dbdcdffe8d34aef10a4f291e51564f709727b4b853023e1235384d",
    "signature": "0x8dcdcc1228ae69f775935a0ffa95bbfdd0d665d6e9b0ac2ba91d3478dcad9058211a533108216fa8649eb21d02d2ab1f792dd0b801db6b6e363bc261da63eeda1b",
    "signer": "0x2F55f68a6D874d95E4F8c2A7376Dacff6c7b8518",
    "userId": "546609624"
  }
}