{
  "manageEntity": {
    "action": "Save",
    "entityId": "1749712453",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0aba77375485719a5ed836032c9106ab9b175baade9f5a7c1acabfcd7415697f",
    "signature": "0x81aaa8158cb5c46653653c4cc07c7044f268d83b48ae40ac38f2906013cae9130eb7aa554076dcf192e8d2f2d5e8e281b5b95e7e940ebfe6cf53745fcd70d6501b",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}