{
  "manageEntity": {
    "action": "Save",
    "entityId": "943385",
    "entityType": "Track",
    "nonce": "0x02489dc2c557b847c1cc8c9ff6c55eddda65274420db54652d1589874abd4ff0",
    "signature": "0x088ca80eeb2e89c9ddf62d33e27f4a2f06d8049da75a34c7fa1117458667ade339a38be75919a365c97e36fc5daea4e3a94adfc4fecd59c50a292d8ef2fa1d0a1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}