{
  "manageEntity": {
    "action": "Save",
    "entityId": "496361",
    "entityType": "Track",
    "nonce": "0x5e22fa911f9b106d53afff630e3f666a3db1c1dd94841dad80d35eb42de6d936",
    "signature": "0xd720746cdc08fec5b83facc073cfc0a67095293345c428465bbb61581cd425392642a73c49cfbd5c3927636d2d2a6471587a3492b0702f3df0495c10204447b41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}