{
  "manageEntity": {
    "action": "Save",
    "entityId": "1023863391",
    "entityType": "Track",
    "nonce": "0xc895ebb6dee76eb84bd1d2708a21fbb8ec528e3f22bdb6c93753083643553942",
    "signature": "0x3700f99dea90f732d9fe808f45eb1e247cdca7128bc8fee1665836a6035b8ccc0de85ed0857a5543954ef22555f9edcb9773ae1326cfad3da721177a59fe27911c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}