{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4885b17befcbaa6d15dc2e743ebbe42fc4cebce3fc956abb6310ec3dd940f5cd",
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    "signer": "0x65BD04fd3A35eFc0A8f60002FB2a5472acF38381",
    "userId": "602257923"
  }
}