{
  "manageEntity": {
    "action": "Save",
    "entityId": "74656",
    "entityType": "Track",
    "nonce": "0x0bb151c7e8dd8bf4cebd53ff3719198ce7aaed43320f1e77648b24e7f4966a1a",
    "signature": "0xe150820dad28541c50123a8db7dc1dfc52a67650dfd750d1fa254d7ff78ed9d91c51ea8cc9ee2428757de93e32779825fff26f314130b4ccfe6cd7502bdebcec1b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}