{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3ce3cec3b43209cc0695c024ab8ee0c36fc317503c9a9dd8ff610482d24b6bee",
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    "signer": "0x76800bfD466A50C833b51d3e2ef54B939416317f",
    "userId": "52582692"
  }
}