{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdd3ef3aec74c99482bf05c887ce946253d04a6baacc0609226dde733baf2736e",
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    "signer": "0x785aA7221545FeFaf89F23A6Ec3684cCEe06aB20",
    "userId": "580031590"
  }
}