{
  "manageEntity": {
    "action": "Save",
    "entityId": "1527481066",
    "entityType": "Track",
    "nonce": "0xcbc70e567106b47fb325ccac433f1b456b0f6952efb181d5e8983ebebdc1faf0",
    "signature": "0x82639eb70a3f1752c4aa0acf099baa8360cf6436f094eb9a1d1eb6acc5448864137ef4bd95244660246bd5c49708be7ef775495e0d1cd71ba9c5b19eedb89b251b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}