{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d5b3b15d1b5cc6223b23ee53925bb826f0e873ec303faeebcb66a33961a1bfd",
    "signature": "0x760b034da766051e2c2652580351cdf0b843b1838cdf4cb871e3f2cf5e8cff592602b6d15aa58d203b628840a8aaf4ef47a90363c6c5030d177b8f398af179d31c",
    "signer": "0x926F8d71a7109CF6Cce00DA74e1BcF50aAf63E8b",
    "userId": "358546053"
  }
}