{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4500fda5d66731fa683577d98a78d936d12c5479afdc59c90acebf696f76cf39",
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    "signer": "0x72Df74554c95e53cc1710D76b72146bBC0F3DedD",
    "userId": "659442452"
  }
}