{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459934974",
    "entityType": "Track",
    "nonce": "0xb66c0d19776ec551c0f811fcd9a8158ab34da5a8f2c84c1574380bffe9440a40",
    "signature": "0x99bdde8d96df8e96ec7d4c1b0849193aeb7a49ed42d56230c4e78fbce078a7bd7801e00299d7379e9dfe7c99a9e58674d5e47fd94f760424926ec310b66ed8d01b",
    "signer": "0x4a32dde6757c86F147e3C1Af86284568E19D14f6",
    "userId": "985727"
  }
}