{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x827c468dc423cc58c3c77f87aacd7164dae82130c6f08d69765ea0778c9eaf23",
    "signature": "0xd77fa9d9457ea39875c761b8b6007c6eafcd004559d6359704a88423671f811349431cafe6b187cd41b27950268baf1b5958409f3bc754aaf5531f98b40f70b51c",
    "signer": "0xF3acf39A68d3E3a503A5a3c69724B60600Ee9ACf",
    "userId": "650818391"
  }
}