{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0623a2b7d2e3e58beb0d06ac6c9b37dd338748336679e5c706a488f199b7103f",
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    "signer": "0x738243Ba097fF3aFBf1C49fE2e39f87C9B6b34Da",
    "userId": "786448704"
  }
}