{
  "manageEntity": {
    "action": "Save",
    "entityId": "87911516",
    "entityType": "Track",
    "nonce": "0x5eaf694e93de66e5fc7b4ac486b2b8c4f0f4e7d095fa674ebce1e11f82cbb1be",
    "signature": "0x8ebaeb6723ae0a555051517f230bfd60f333f345cc296dedc650a4f3d8263f416d88dbbd0fad01483671b60b55a90dcd584bff33cf60bc0c904e9f4f042d6f491c",
    "signer": "0xC56eB9d3Ec63d8224604ccEA763cBcCcca244b24",
    "userId": "307547140"
  }
}