{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524866242",
    "entityType": "Track",
    "nonce": "0x1e1cacdb48483fdb0ebb9177815262e2ee2578e35fd7a10e0686f60cbdbcee61",
    "signature": "0x9502d36c2758b0738213b295e035d74049ed7f0097afa139ff694bcaecb4aaea6184012d5d488f3bf3d933bfd500b82006ec3a37b6dc23f38eb1429125f085421b",
    "signer": "0xDd3a907a1e003eF6A49e4c3e6a0fbbe6aE7746E8",
    "userId": "603183494"
  }
}