{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf0db7cf8776d76440e14214522daa92746238afb8390b513f2a0bf540ad30290",
    "signature": "0x46a516e9381a408979515eac2eb36a23ad6d0bb31dafb781ccc86a16345763490290d719d584fcf011b00e11e6cd879619aed59c67cd86023f3527c3e03638f31c",
    "signer": "0x77282D6E34A98bE21dc6e6BCAaf9eCCedd4f6e38",
    "userId": "317157277"
  }
}