{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401462565",
    "entityType": "Track",
    "nonce": "0x2e3fddeebcc4d83e4ad3c70990ee60a3cf8d422a460ae33438c0825e06b4391a",
    "signature": "0x687a924fda5562f413d6e284118acb79f700b1f2bbea209a4b6e63f47c8995a51c596c958b9d328383642686e4c69608160d31ddb5dbbaeb11551e50d74e3e001b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}