{
  "manageEntity": {
    "action": "Save",
    "entityId": "467522949",
    "entityType": "Track",
    "nonce": "0x12aca64625bd7e41dae3feab01287bc1fe082b4cb1a5ef8a7c0a6f6a60ad4780",
    "signature": "0x67b208db3aa416ab7d4e970b130f65b23c0678b2c87d7125e391647f6c48ab450273a38bd73caa5743572d91c96eb8da70c275dd813b93e8dca9e49cd684f78c1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}