{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc546ee1d482f6962fdcdbd8127e5c6667de6b246180b830dd76dc31b9f2ebadd",
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    "signer": "0x8133D4Ea8b0296682544599637fe69F0E6B4126C",
    "userId": "76059272"
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}