{
  "manageEntity": {
    "action": "Save",
    "entityId": "556210696",
    "entityType": "Track",
    "nonce": "0xc6693365f773f8238e8ffd4dfbc6370eaf3d6d15a1a6053310587f710c892f0a",
    "signature": "0x0f723954c3a7139eb4c950d1bd7888b4b7ed825ddd89b280fa070eb37b7da4cd13e5b38bf241f313314e3caaac6ac0ce7bb64cd4a290b32dc7e109a93946d7f61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}