{
  "manageEntity": {
    "action": "Save",
    "entityId": "539763680",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac17bca953e5a96c40bb9747cae88f1ce3c771d3c6466944f145cc072475f907",
    "signature": "0x78bcc619c1e03d596ffc3adc72abbda4114ff2d8909b381167a3bad85828ce01750e555a241f6b4e3517c37fd6aaac8d92a3e01e3854bfb9cc9d5e606a77ee831b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}