{
  "manageEntity": {
    "action": "Save",
    "entityId": "1852857053",
    "entityType": "Track",
    "nonce": "0x851859ef77e7a224e8fc351f0974972e8edc2e63769d9b9e0d13e80608143fb3",
    "signature": "0x17592e988c6efca796eb31106fb931457a761982e18dec83f7cfbb8347c70eae7c895a0a3cb9db63369316a15047b3b51ed0402810ee7a8e6ff689d61089f49d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}