{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3742a90db749ac324e158212194810b67ea9f2e2068f5e986080a2def2c8d093",
    "signature": "0x61157b5cc34ebefc5812819e94bb8e6bbf8b2bb572f78b3f7f36643968a1f24455bcdfe039de3e7ba6d750b652ad5ecaa4d423e37915dc82f6be2e1550cc667f1b",
    "signer": "0x44463C62EeC8101317152A86f19307941d2D3cBd",
    "userId": "949893395"
  }
}