{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037817376",
    "entityType": "Track",
    "nonce": "0x6b532d9e4603da27b763da00277b70ad1134f0f0d2e3f2aa0a61d3b8ba55af36",
    "signature": "0x851f2c76efab048aa9db497bb2ffa4c87395a3d7c4ff7aab7187f921cc3dd1927476215820fd8abd06b20b4a07ce3c43ff35cb8e95e3d463adde23b3dc943b6d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}