{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x647ffc17960789ffa7540cbd860ad24309054f7e99f88a84628c39e2bfa0c828",
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    "signer": "0x6313d065d34f89f9FC6BF460347CF8c76085A4a4",
    "userId": "370952704"
  }
}