{
  "manageEntity": {
    "action": "Save",
    "entityId": "942392870",
    "entityType": "Track",
    "nonce": "0x6fd3e8e5dc8711b9be6546087b78d5e0f7369c1c0bd138aa6e5226d9ca956d45",
    "signature": "0xb0003678772c87113191879e7c777fe8f6dcb218de3baaa0ff730246c298630d3ad648e9844c35944a77a2ec8a13e679dcff0814ffb494a46ce7b9912a340b3e1b",
    "signer": "0x92a5082636c97Db0Ae888484D85e4c8494A3B791",
    "userId": "895527427"
  }
}