{
  "manageEntity": {
    "action": "Save",
    "entityId": "2005854941",
    "entityType": "Track",
    "nonce": "0xa3393dcdaeb09b7f804b5904cbd8beea802e8e0d176f1b967820568ce1e4e32f",
    "signature": "0xb13b1046032f8cecc94aa3e88b6d146c81f510a9fc18e94a4ef252ad1f65df771231887b2a7690e23714006552e8ff12f1c382401c387cab4c4b2efc9331873b1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}