{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe0d8f54d201c7573c3496d8025c5ce5811ef38bff7c6e232b236c029228d35c3",
    "signature": "0x3f2187ca965fb92d585d10c0a2e716034dace04e37392f5626c1ce27bf628a29404ade4e6097a81e16fe721eb98eeb088537a885942bfb6ab895fc5058ce78c61c",
    "signer": "0xa1c8941CCeD26acC7A1d5aD568AaD13b7C4BACCd",
    "userId": "292565943"
  }
}