{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x798f04d66cc34feee55d44093db443b13ae6e11aa9406f24c1ff5f1de5b84c4d",
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    "signer": "0x79621848DfCcB269a5B938fc4f1000c9AFD98d29",
    "userId": "136287868"
  }
}