{
  "manageEntity": {
    "action": "Save",
    "entityId": "891740611",
    "entityType": "Track",
    "nonce": "0xb9b8196c53d15cf390789a1a2ebce1cb04e7f195a5166910de3235528b2fe281",
    "signature": "0xa433ed69a06b88db862afc1d20e754593e03b3681d37509e56f3b748109b64234a23532d321e8a3313d52bd4faf5312bab52cf09da608c271da9ba170859f21a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}