{
  "manageEntity": {
    "action": "Save",
    "entityId": "135508",
    "entityType": "Track",
    "nonce": "0x24a45bf1d32108c37e95beecfd0c68eaf3cf04c325cc2743ae06d6d454c5a2b1",
    "signature": "0xb9a81d6581a853285276a553ef69f9338628d5bc3299aabe725c78ec5170a1bb69b923d4db7ff092e8dc4b3247a24086009f3a9578cdd3a9280711c1752d15d21b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}