{
  "manageEntity": {
    "action": "Save",
    "entityId": "228883206",
    "entityType": "Track",
    "nonce": "0x35405457bcb9641298d2e7e2f7839c8417fab4b248162d3ad5cce71e30e93029",
    "signature": "0xc8a3eb0795fb2ec4dbf65a047d4519dc923b8192809fb50ecdffa05d1965acd720d57572dfc6491768dd1e90016cb9a3eeafb445702e8881b866d1def705781f1b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}