{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x442c11bb4368de59ec612d8c3534ac8f748f7c55151ad8a67dee3705c2e3e504",
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    "signer": "0x6598d2b74ABF4B93C1f39224c710Bfe47e4F8D5c",
    "userId": "877166538"
  }
}