{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x788b14b87e1d11fe9fbb6b18af55ad22e8e82d2fdaba7e41131346bc102f2733",
    "signature": "0xafea28cdb12aeb694142d2d94e7ae2a404681c24c12e0137a2e023eb0337da02097b7b6f63c816c2a6b7390c0f9509aaebd1315b087017f4412f112eb7c659331b",
    "signer": "0x6C3004be0a15E38c4C10861a373c4dF67C0bBc2f",
    "userId": "339021739"
  }
}