{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe5c5bfd7db0dca0741542d58aeaa0dc202653254131afb29742a14d4c0aff127",
    "signature": "0x91568aedd2c6bfab895af36db75c95417f151e4110d9c772c916af12a9cb9cef74ae6089ddd307852b760f81c4c39a1c7f4d7ed6170f2d4275b52102389597ce1b",
    "signer": "0x3B7dCca3b588d59c27066b2110cea8aD7224E7Be",
    "userId": "60529979"
  }
}