{
  "manageEntity": {
    "action": "Save",
    "entityId": "433405956",
    "entityType": "Track",
    "nonce": "0x129186fba00d7e48c4e1ac5f0301ce580d8de53cddde5900f3e682dc021b4419",
    "signature": "0xf6fafa5d95e2da57abfa8a25ea03800ba95be597d9179202433041a92e816bbd05e42618d95edb697ae28787d2e3e2b38538ae30eefc07b99b3b2b7914c42bd21b",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}