{
  "manageEntity": {
    "action": "Save",
    "entityId": "2124117847",
    "entityType": "Track",
    "nonce": "0x5425ae5b087134c241f74828b6aac044f26b67110e8868cc3f77043b83f3f513",
    "signature": "0xbcaadf4e1ce9760bbb50bec91b37a918cca5089d06caae6ef4f12290251f59f3381de31fb3c493fff5cc933c709588a7c95e9305e0038541fbd21faf3f1659b31b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}