{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x572dc9db78158a2751bf8a3dfc25472438ef829d1bb67aae3bc999afd3b00e6e",
    "signature": "0x34e73c1bbd022790739b5712cf15360dd5a9692047601067e8034135a364b30930fea8a4d4c3d61a46a512f1b4d1eb8d18bd7e3257417b51d5f8df12953871c41c",
    "signer": "0x2C4DB7DB5E5E0C2B51D2944aB8F283c16d49B898",
    "userId": "84949150"
  }
}