{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5fdc2a7bf52162405d0f279d66d7f2114f010affa538e8eab3453de1b91e883c",
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    "signer": "0x3067d241baB7e3FE988f593d54881a5AfceD63A2",
    "userId": "382101985"
  }
}