{
  "manageEntity": {
    "action": "Save",
    "entityId": "131483470",
    "entityType": "Track",
    "nonce": "0x0c51ec954a5a83f772f4e0d201d68bdcb8bfe1b059d0c40d84cfbac0fd1a5464",
    "signature": "0x76add14a7da6511727e06c870d5d26b5f1fc51f0b527f192d2fdbae798df83534b62071e41296d1d181bf34f4b88bb69daab9a510bd14d44bbbed921e7d996b51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}