{
  "manageEntity": {
    "action": "Save",
    "entityId": "532156977",
    "entityType": "Track",
    "nonce": "0xa4bbd8b1eda06bf81d0e5fd852b7485932326c03ac4e092b0062deff065d133b",
    "signature": "0x04a46823566ea76728e38b40f33e440733a617418181f1e514fe7446971a112e365aba7fcb510ac4092761634331bf55e2eaa1670b03a92b4d0154b55f91b3431c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}