{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9c7372aa130d1fb25c7b820dc8e089874d605f94b82fa36ed82576dc3fff65d2",
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    "signer": "0x7D54a8d4767c4545A38F5a106a20aC879E63CcED",
    "userId": "321160448"
  }
}