{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e0e8e6011cb90bc6350711638eef7f952a921539741ea8d344ba3b50ebec335",
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    "signer": "0x5EfA9a4B8297fF11C3f5813942706bd039A47a34",
    "userId": "446570480"
  }
}