{
  "manageEntity": {
    "action": "Save",
    "entityId": "465977271",
    "entityType": "Track",
    "nonce": "0xcb1b7dc528642c527581d197e23e19b06eb8a5d6ff0e144d40775b0eb4d0dd84",
    "signature": "0x0836eb5a43af23c897a010786d6c6eb1a4286730733a9d7ea169ab15b90f2f6b76b354af70c4bfc8b2703afc2c2741bbf4b784a25a084f900d6cc40a29bb08551c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}