{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdb38fe3689cd3d60de485f1f8cb03ea30f12ede189d1de7c49953c7a450e4229",
    "signature": "0x94fc93de2f9e472cc418589338a5f3ef54f14dbc290939374daa53227abc9ae071a6a603233c30aa846e980bfc945889038252b40e4236566650394faec0396b1b",
    "signer": "0x0A2F5D4CD50BFc8fcee7d40dFDCfBf866422FfaC",
    "userId": "675013541"
  }
}