{
  "manageEntity": {
    "action": "Save",
    "entityId": "546498762",
    "entityType": "Track",
    "nonce": "0x2c5f40988c58c38df0ccc137fac74d3cbe0c13f230f6ee7a1a765653725c401f",
    "signature": "0x533aed9a9152941c3a8d73efed26a50ba5a9f19c78e2a069362662b21135a10002d6ff75bf344e5ee3dd6e47c9ff3e31d525ceb47e9c281535f862d9b14771281b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}