{
  "manageEntity": {
    "action": "Save",
    "entityId": "4924",
    "entityType": "Track",
    "nonce": "0xfaf47dc724b5504ff30de2411e1cca2d0d6fe936dfffd50d103c7bd20a45d9bb",
    "signature": "0x71794c2375f859ea5701cc5ab8c2e6b520a35961ff065786c71c07538d8957da41c2ead24c11aac38cf20c52358a9b399f14da2ed5b171558b99d6d76755c77c1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}