{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x96eb61489d901749c0badd2feb0465dd27843bb81b3b92dc53d34a426c05b0c1",
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    "signer": "0x60503113D254c437C2ea4c18d70C8a9e20fD871f",
    "userId": "515269421"
  }
}