{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247192541",
    "entityType": "Track",
    "nonce": "0x2e545f9f31e59c07b11f1bf48259efe0a4492945d8db77027d6c3eab9f59e6e7",
    "signature": "0xb859fea12d8ffebcf2a5d2da1abfa685c4b840623e86976db415b719b4b7a1f003169bc0bc3d5d94f16177e3f97e4887a914aa87cdf282ccb9cd6621f1fc1cc71c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}