{
  "manageEntity": {
    "action": "Save",
    "entityId": "1321015901",
    "entityType": "Track",
    "nonce": "0x359c9ee5a33700217bc4e1f2b6a459a4b282ebf0a69161157a971d54b531677f",
    "signature": "0xac6854dcece5708efb013d229529a1aa16fec32c4f687961b064a9421be7959d66d8b0310c6c50ebc3675b47948478c4a84b19922853f08f54b2d2c2179b4f4d1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}