{
  "manageEntity": {
    "action": "Save",
    "entityId": "977668501",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d6b3770e82d551f6ffc6374b8aaedad116b1d072aa65d027f98538ad6951172",
    "signature": "0xa1d9e3a5e616d1a373e00593c0a0710732a1062298901273c00397499d1a206d5e6c8be6f678875642aeab605bcf1285548b6fe31de7ad0a7fd0ea6608d3e6bc1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}