{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5bb30628d4401a71c3d416447a0f634ed4a01208c3fe7a36bfe1c245e8405136",
    "signature": "0xa834ae89b15704befb4ace309f69ceecf06329d0db8526b9383839f529a121c972551d0a62e3760ca6b6814468739a34edbd236e791c965bf83906b6fd654f221c",
    "signer": "0xAd3852b57Ce1853b5633884cCEb6bCF48AB644Be",
    "userId": "608902598"
  }
}