{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd05241d95c8bee0cfaa560f0c1f6b7271dc5cab8ed44bc01dee128fe9e314bbb",
    "signature": "0x90da74dcf57daaaf9639572d92ad678c56ea4f5d9d51064f718f2626c3ea8eee65bec46b591e4b1ad7ba71d35ca0700c5e5ee916c43901cd29cf9c97b9b7e1811c",
    "signer": "0xeEd2A280C6ADbecba7470EB5460Ff98E4e7cdEA2",
    "userId": "297600724"
  }
}