{
  "manageEntity": {
    "action": "Save",
    "entityId": "987463",
    "entityType": "Track",
    "nonce": "0xd2aecc902117e51ebf6bb6c66f0b122eb7e1844feb1fcb9aa1f9786dd687e1bb",
    "signature": "0xbf2d8d84fb7ea4612f306321fd3932bdcf4aa5b485c164d6d5ec9b05b0dd05d252b86ca4af765ac3a7f4b64d6e784a32ddd6365f148bf9d3b824590fa8a26b891b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}