{
  "manageEntity": {
    "action": "Save",
    "entityId": "472313",
    "entityType": "Track",
    "nonce": "0x7639180f157966996f9da4bb1bd442eb8c561df25d14c32684bc1d850874ebff",
    "signature": "0x1312183c60f1ed9f41eba0487a52ede6d060c4ef81db9de04b7ff9f02ef136b858e2a9a41ffb662b6b014465e56ef1a35058da82010033f119e3b73a66b781291b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}