{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbfacd36fae62b7f9004f52f38ddfbea66fcbb1471f4a554a942106035954b8dc",
    "signature": "0x7c734081496d36d93b4f58ef3deef7e1f55cd3b11841e101bba1d9053c49378308b33626079027cfbce482ac73fab5b7f8d6d6f0492245bc814c3c2000e030a51b",
    "signer": "0xa716EE6aE1fcAF06103c738DEC715D52277f96DF",
    "userId": "450917397"
  }
}