{
  "manageEntity": {
    "action": "Save",
    "entityId": "1977742236",
    "entityType": "Track",
    "nonce": "0x35b0c4af7fcc5a386287ff01d794682c7150af487acbe182f0d1d722aac7d639",
    "signature": "0xec4967ac030afb843e4305bddf935048ecde7cdace0305006356353325ad93ed66b94c6ce19c91f53b7b86205cdffa864f2a0093269e2e41cbb70de47d8b579a1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}