{
  "manageEntity": {
    "action": "Save",
    "entityId": "1628008247",
    "entityType": "Track",
    "nonce": "0x7d0d608ed76bf50c849e56b805c5b7a21dd0db002575927ba9f3caec56277b4e",
    "signature": "0x62f92342b1110e79014198541be896af45c312fb3740043c833403c79b32cdc52263564a4c631cf20181e262772587709149f4cab717a897e0e2f00a239fb0b51c",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}