{
  "manageEntity": {
    "action": "Save",
    "entityId": "1128931890",
    "entityType": "Track",
    "nonce": "0xb1e4e3256a0ec887f7b615f80dedcd76c423f4b441efe4edcd1f4cc374c56e60",
    "signature": "0x39c21182765a5480eb7bbd24583ef0b88028f7852ac00504dd59241ac2efa2c52679b68dd5dc21b8d3f49a226ff4cc47edf08f3e58198988b70fb33d2c5a44351c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}