{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3cd4558b4c507ddb75ec8d00e9fc696e25591e9c60dbd9b90a740d51d8171dba",
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    "signer": "0xa54f9bCC400F30D5B6751e9FFbe2529bFFD425dA",
    "userId": "366298414"
  }
}