{
  "manageEntity": {
    "action": "Save",
    "entityId": "406078",
    "entityType": "Track",
    "nonce": "0x3b16453ef5e3cffbfcc29dc6bb9817a7b38268b3a32efba1a020aa7668afffcc",
    "signature": "0x72a85df82512b34fb7119d824d3e577d594f825d5c879f4d217420590d8fca675bee35b3e70d2e4e57eec9312c8aafdafb985239f8c4fc0b1e9ffe669986f9f11b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}