{
  "manageEntity": {
    "action": "Save",
    "entityId": "219201887",
    "entityType": "Track",
    "nonce": "0xe12f8236a52502b9c360608bd9fd8bf30c5a0a8dc27b54dd9c8b62c27ecdcfe5",
    "signature": "0x52222a7816eebb38c502f586ad06cf0ce6e5ee8dbfc4ef07ffaa8e7bdf91e7e8258271355f9c152f588a68ab5db9fde6905b28b7f242a21012a53fa0ab7e86281c",
    "signer": "0xC62d580617B6927bf532824Dd1e068646677b30F",
    "userId": "782022954"
  }
}