{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb72972ef27c645b8cb896eda3b073e8c6775b510e4c8a3dbf7007971cecfba87",
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    "signer": "0xb5599Af31664c076A98Da649129e26cCB93D5Ab7",
    "userId": "648241147"
  }
}