{
  "manageEntity": {
    "action": "Save",
    "entityId": "359407399",
    "entityType": "Track",
    "nonce": "0x8a441014b82ed93d6fb195c795cbc2cc4052429d8114c0e99115ea7e2c5241d1",
    "signature": "0x01cc82dc7a7ac5586d7e0110726675cd3559e1ad488632eb195ea786e6c72b7162ed2e9ac4a0f4db25045af577f87c6c015558999c9cdbb1cffbffc34d1a75d81b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}