{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3884a4d9a9f7a747d534d065e0dd6cc5d4ffa196e6e8b673457907131fcece89",
    "signature": "0x5a7e066258cefc992fc500f7fd3a08e58e7507c0c45a3856524890042c4a0e4b6fc37f595606e7ad70f005314f3deae97c9cb0cef6644a8e09551304432b95e81b",
    "signer": "0xD21192e92319319249f3df55efE06b0809861c8f",
    "userId": "924892254"
  }
}