{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x98772a152f7806cf746383bc787a36ec36dd505bae3969486379ccccef2d58ba",
    "signature": "0x7d05f0981851879e00fe44e0691a2f48ce69024a2ef1fbc096f663b5b6f92650664ae97e44859033f35be7072eea7cc8eb6312850280bc248a78af7cfb415dd41b",
    "signer": "0xABd0F4c7AE6DB4a2906e3C7286C55aA9C4933854",
    "userId": "11766687"
  }
}