{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xad349566be973b13866dfff028d50355c1572c4fb9e0c65d9e86abaf8029771d",
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    "signer": "0x520296aD627D45164e31c459d73885ade51FC107",
    "userId": "585607472"
  }
}