{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7364f30b65cc6fe98198cc588c9d444b7c42c53467a3d3da1c586dc39d6fd6be",
    "signature": "0x26161dc94e0ae0b85b16a0a9404ee80ad8def7ca1e35d9e56861fc06f769b4737305981ec4e36a7f5ab8fb8f09c335508ff7053e8fabf889e03a11411bfc2d261c",
    "signer": "0x498CfcCbEa9a4C4f3B2CF20371c2F964e54b7aE4",
    "userId": "708784155"
  }
}