{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6ddd6c378b2c1907f139367ba82920fd472cd894e206d4083aef8e7d25e131b8",
    "signature": "0x0e42f714336f8cbd30b5764b5c71a40263a4556afe3fc217711eab3b3c5778947e3dee550529b5146a601c49ba47d89fb8aeecb88ae5303b19856b47f02e1ab31b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}