{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x336a073f59996542588412084683f03dd7bccdb878a4c17ffee0ff96bf3b1cf3",
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    "signer": "0x3F11C9FC3f1Da6207f51f99A3A3D5eE10A91C9Ee",
    "userId": "54091821"
  }
}