{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9a29876477e49c9bba8635483dbea9634b7783be47d28545f893eb9984bffb47",
    "signature": "0x3a02d5a748c00a21709f24f6739c616b88cde33ef18c9e870945deca6f1875962a1d4a800576ca5911df6349fa39e148885697f1a0b0169590c9aa8613b5f9d41c",
    "signer": "0xc65dFfE1a1134FA9B16cFAE24fCc4CA150E84FF6",
    "userId": "559081263"
  }
}