{
  "manageEntity": {
    "action": "Save",
    "entityId": "1115479664",
    "entityType": "Track",
    "nonce": "0x59b50c65aec333c70a5c883797058d10e1c789a0281cab4764361aa582890583",
    "signature": "0xeb1ea73387ee9fa2c83219ace33cf2ed2f7fcaed62a8e02bc21189cdf78506240a57e5282f5128196685a0981121a3f2574e3d8cbce06ff9e906e55dbfe1b6611b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}