{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x641e4a0bda1c5c173bcc0bc7ab92c94fcc0884b1daabc745bea9d6b7dc4a8d7f",
    "signature": "0xe0ebb0c182d32313dfa9fcabdafcf8493ef3b5cade609c587fe922ac23724a5f403f0c35613fcc6d5b24af189d32b76f72a6207da09fdb6d1017d685018631f01c",
    "signer": "0x00ad4d8D6D565E2352C9D29Ad50Ff7601aADb2Bd",
    "userId": "725898952"
  }
}