{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9002485c411c5b81439a15a51ed18d1827b70c27704d51a0fd85520eae9ef8d1",
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    "signer": "0xFf72bd5bFc445d05eBCca0E92057f747b2059878",
    "userId": "83657080"
  }
}