{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1b961604fb54da20085b5869e0eee430eaf4a0da21a760c3585780f473affd15",
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    "signer": "0xAe9F8ee3116BF8F54Cc34D0c73F8422EaC519108",
    "userId": "984947602"
  }
}