{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x04c0e62a52420b612af5da9109665323d3f1666f0a916227c9ed4d13cda1b1af",
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    "signer": "0x55E8eBB4B9aA0661848Eb3a724fE0860A3CF3D00",
    "userId": "907870351"
  }
}