{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x002b926686333f45dbb33e0fd894eb5b2c936594fc0cd4cfef33f4109ee4ee9a",
    "signature": "0x7f0ca6131dec68de8e2926139c2d969fb3d31a051e6b8d820aefc09919bb9d81067bfb2d40c31b752a4914fa945cc2573bb1d2537d77884e361cb6522f0aaa7b1b",
    "signer": "0x3aae593151C2D2A71F96C0Ce45e811296a1f58cd",
    "userId": "551271495"
  }
}