{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x13b056fbbff7d5fa4b4bed1fc6ddb2b12849456453b0fed81d4d08e1768296c4",
    "signature": "0xa81e8b68e38a23fc9f494654622b24e33f4c75bbf0770e9f22e66300f2f96eb07034832e11bf506e9ecd614d5e5ee442f26707a399ac53ddaa88e2a164ddbe721c",
    "signer": "0xeA94Ee2ea776d6127FCbe3D570D78294EB75b2bA",
    "userId": "286268923"
  }
}