{
  "manageEntity": {
    "action": "Save",
    "entityId": "834724711",
    "entityType": "Track",
    "nonce": "0x5c408cca2bd3b1a770d35a153d32e7f67064a771ecbe907c5c010d7f96a6b821",
    "signature": "0x358e9002d85eef80067d919eb4886ed7c9799320ba121856df938d145d311be3274a0a5ca406aa8a1d8d75d1c455369fcde8b170281447f92de1cba2477e66ee1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}