{
  "manageEntity": {
    "action": "Save",
    "entityId": "803117328",
    "entityType": "Track",
    "nonce": "0x46ae7010215bec23346ea09be9ee39dfabe98b60c2ecfc43a2bd068ff0a855a5",
    "signature": "0x73c76ef03115567a2e8c1fa7a60d136a4bdc4425b466c5317f4d1089064a06097f6f75a97030671b4fc658959206f6e4cfa1e6724fbfb8075dee168009cce3081c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}