{
  "manageEntity": {
    "action": "Save",
    "entityId": "1668676603",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf33ae9b1640241bdab7688ad5fe7f3f0d1e9d44c2a778495802e054f040332af",
    "signature": "0xa2e347b137b6949a3c407a756e83c23ebae40bdadf025874d4bb1a08549d667734e9d01bad0694b9c752de22d79dff3d11604c4f9e48f2b0826b7ce66ec11f451c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}