{
  "manageEntity": {
    "action": "Save",
    "entityId": "715626625",
    "entityType": "Track",
    "nonce": "0x27e0d75cbd8b0dbe9aedb9715d338580eb831b14b151240651dbfb36b6d4d1cf",
    "signature": "0xa1f8cdb122e3320b536f5024ba4065731c8ddf52c2e867ecd44939c6747c0d083dfe22ce57d91074fa7c8cd11a86f5e8c8524628bfcb5f2561a4ac7f4f0ec4221b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}