{
  "manageEntity": {
    "action": "Save",
    "entityId": "283386247",
    "entityType": "Track",
    "nonce": "0x27be7f47522943aebce8482f88e6180285cd35df29aceedeb4362d597035ec48",
    "signature": "0x7ffcbacaf25c10bb591d4e93d5e9656cef713fc3f6f3733f8fe3feaa9838e3c37e6d4f27f88d86d9877846a4e453ae49fd5ba9f66f77b20a8d360dea982d1dbf1c",
    "signer": "0xD07A680d4F48bA7Cc076c23f40870AccBbad1987",
    "userId": "16411799"
  }
}